Figure 1-3 Freight TSI and the Economic Growth Cycle, 1979 to 2015
Friday, January 6, 2017
| Date | Detrended Freight TSI | Detrended and Smoothed Freight TSI |
|---|---|---|
| Jan-79 | 1.7971 | |
| Feb-79 | 1.9061 | |
| Mar-79 | 6.6960 | |
| Apr-79 | -5.1791 | |
| May-79 | 3.4627 | |
| Jun-79 | 4.2483 | |
| Jul-79 | 3.8376 | 2.2950 |
| Aug-79 | 1.3584 | 2.1469 |
| Sep-79 | 2.4848 | 1.8540 |
| Oct-79 | 2.6364 | 1.8479 |
| Nov-79 | 1.1511 | 1.7976 |
| Dec-79 | 3.5667 | 1.2806 |
| Jan-80 | 0.9449 | 0.6582 |
| Feb-80 | -0.7964 | 0.1814 |
| Mar-80 | 2.3703 | -0.1619 |
| Apr-80 | -1.0021 | -0.5241 |
| May-80 | -1.9209 | -0.6752 |
| Jun-80 | -2.7754 | -0.7134 |
| Jul-80 | -4.0758 | -0.7085 |
| Aug-80 | -2.1715 | -0.5664 |
| Sep-80 | -2.2245 | -0.4395 |
| Oct-80 | -1.3480 | -0.3026 |
| Nov-80 | 1.5098 | -0.0471 |
| Dec-80 | 2.2917 | 0.2539 |
| Jan-81 | 2.3366 | 0.6198 |
| Feb-81 | 1.2214 | 1.0026 |
| Mar-81 | 3.3989 | 1.2580 |
| Apr-81 | 1.2548 | 1.4346 |
| May-81 | 1.9538 | 1.4408 |
| Jun-81 | 0.5739 | 1.2035 |
| Jul-81 | 1.3576 | 0.8970 |
| Aug-81 | 1.5827 | 0.5950 |
| Sep-81 | 0.1500 | 0.1828 |
| Oct-81 | 0.5171 | -0.2418 |
| Nov-81 | -0.2073 | -0.5420 |
| Dec-81 | -1.6875 | -0.8182 |
| Jan-82 | -1.0388 | -1.1236 |
| Feb-82 | -2.6524 | -1.4866 |
| Mar-82 | -2.6197 | -1.8840 |
| Apr-82 | -2.9159 | -2.2573 |
| May-82 | -1.0823 | -2.6684 |
| Jun-82 | -3.0180 | -3.0104 |
| Jul-82 | -2.3802 | -3.1594 |
| Aug-82 | -3.3912 | -3.2601 |
| Sep-82 | -4.4130 | -3.3827 |
| Oct-82 | -3.8808 | -3.4183 |
| Nov-82 | -5.6755 | -3.4313 |
| Dec-82 | -4.4264 | -3.4233 |
| Jan-83 | -1.8753 | -3.1443 |
| Feb-83 | -4.2332 | -2.8169 |
| Mar-83 | -3.9810 | -2.5954 |
| Apr-83 | -2.4087 | -2.2696 |
| May-83 | -1.9029 | -1.8691 |
| Jun-83 | -2.0037 | -1.4269 |
| Jul-83 | 3.3013 | -1.0358 |
| Aug-83 | -1.2169 | -0.6916 |
| Sep-83 | -1.2699 | -0.2407 |
| Oct-83 | 0.7944 | 0.2421 |
| Nov-83 | -0.7388 | 0.6201 |
| Dec-83 | 1.2497 | 0.9625 |
| Jan-84 | 1.8350 | 1.1218 |
| Feb-84 | 0.3185 | 1.2022 |
| Mar-84 | 2.2892 | 1.4425 |
| Apr-84 | 2.9063 | 1.5585 |
| May-84 | 1.8560 | 1.5639 |
| Jun-84 | 2.4544 | 1.6152 |
| Jul-84 | 2.6656 | 1.5072 |
| Aug-84 | 1.3497 | 1.2430 |
| Sep-84 | 1.9298 | 0.9767 |
| Oct-84 | 0.3778 | 0.6227 |
| Nov-84 | -0.1911 | 0.2322 |
| Dec-84 | 1.9319 | -0.1272 |
| Jan-85 | -1.4379 | -0.5750 |
| Feb-85 | -2.7497 | -1.0287 |
| Mar-85 | -1.0343 | -1.4510 |
| Apr-85 | -2.2649 | -1.8778 |
| May-85 | -2.3462 | -2.2085 |
| Jun-85 | -1.9683 | -2.5314 |
| Jul-85 | -3.6599 | -2.6923 |
| Aug-85 | -3.2131 | -2.5883 |
| Sep-85 | -3.6417 | -2.4682 |
| Oct-85 | -4.2944 | -2.3583 |
| Nov-85 | -3.4561 | -2.2079 |
| Dec-85 | -2.5525 | -2.0898 |
| Jan-86 | -0.8153 | -1.8756 |
| Feb-86 | -0.8763 | -1.5072 |
| Mar-86 | -0.0240 | -1.1735 |
| Apr-86 | -0.6382 | -0.8638 |
| May-86 | -0.3645 | -0.5274 |
| Jun-86 | -1.1147 | -0.2516 |
| Jul-86 | 0.6267 | -0.0824 |
| Aug-86 | 1.3429 | 0.0354 |
| Sep-86 | -0.1887 | 0.1519 |
| Oct-86 | -0.3157 | 0.2484 |
| Nov-86 | 0.6381 | 0.3691 |
| Dec-86 | -0.0258 | 0.5149 |
| Jan-87 | 0.7187 | 0.5936 |
| Feb-87 | 0.4151 | 0.6470 |
| Mar-87 | 1.4817 | 0.7615 |
| Apr-87 | 0.1727 | 0.9940 |
| May-87 | 1.7205 | 1.2631 |
| Jun-87 | 0.2994 | 1.5270 |
| Jul-87 | 1.1027 | 1.8416 |
| Aug-87 | 2.1476 | 2.0945 |
| Sep-87 | 1.7535 | 2.2582 |
| Oct-87 | 3.3235 | 2.4840 |
| Nov-87 | 3.4579 | 2.7363 |
| Dec-87 | 3.4860 | 3.0005 |
| Jan-88 | 4.7578 | 3.2605 |
| Feb-88 | 2.4455 | 3.3621 |
| Mar-88 | 3.3813 | 3.3898 |
| Apr-88 | 3.6921 | 3.4382 |
| May-88 | 4.2551 | 3.4062 |
| Jun-88 | 4.1073 | 3.3797 |
| Jul-88 | 3.5345 | 3.3231 |
| Aug-88 | 2.1528 | 3.1883 |
| Sep-88 | 2.4150 | 2.9918 |
| Oct-88 | 3.8221 | 2.8373 |
| Nov-88 | 2.1918 | 2.6736 |
| Dec-88 | 4.1170 | 2.3457 |
| Jan-89 | 2.7665 | 1.9607 |
| Feb-89 | 1.2021 | 1.5690 |
| Mar-89 | -0.0905 | 1.2359 |
| Apr-89 | 3.4563 | 0.8670 |
| May-89 | 0.5604 | 0.4859 |
| Jun-89 | -0.0665 | 0.1590 |
| Jul-89 | -1.5309 | -0.1801 |
| Aug-89 | -2.1829 | -0.4233 |
| Sep-89 | -1.2439 | -0.4568 |
| Oct-89 | -1.3741 | -0.5405 |
| Nov-89 | -1.7579 | -0.6810 |
| Dec-89 | 0.2215 | -0.6832 |
| Jan-90 | -1.4761 | -0.5943 |
| Feb-90 | -0.3929 | -0.4326 |
| Mar-90 | 0.7018 | -0.2799 |
| Apr-90 | 0.6558 | -0.1933 |
| May-90 | -0.0111 | -0.1478 |
| Jun-90 | 0.4518 | -0.2258 |
| Jul-90 | 0.0833 | -0.3567 |
| Aug-90 | 0.0832 | -0.4765 |
| Sep-90 | 0.1563 | -0.7615 |
| Oct-90 | -0.6958 | -1.1391 |
| Nov-90 | -1.3452 | -1.4924 |
| Dec-90 | -2.0632 | -1.8110 |
| Jan-91 | -2.3320 | -2.0225 |
| Feb-91 | -2.4128 | -2.1236 |
| Mar-91 | -4.1177 | -2.1846 |
| Apr-91 | -3.5871 | -2.2331 |
| May-91 | -4.2488 | -2.2500 |
| Jun-91 | -2.9552 | -2.2386 |
| Jul-91 | -1.5861 | -2.1765 |
| Aug-91 | -0.6746 | -2.0546 |
| Sep-91 | -0.5498 | -1.8276 |
| Oct-91 | -1.1526 | -1.5287 |
| Nov-91 | -1.2960 | -1.2016 |
| Dec-91 | -1.8380 | -0.9421 |
| Jan-92 | -1.0655 | -0.7891 |
| Feb-92 | -0.7536 | -0.7133 |
| Mar-92 | -0.3302 | -0.7703 |
| Apr-92 | -0.2012 | -0.8271 |
| May-92 | 0.2155 | -0.8366 |
| Jun-92 | -1.1901 | -0.7977 |
| Jul-92 | 0.3191 | -0.6221 |
| Aug-92 | -0.7588 | -0.4725 |
| Sep-92 | -1.8338 | -0.5176 |
| Oct-92 | -1.2328 | -0.6352 |
| Nov-92 | -1.4447 | -0.7366 |
| Dec-92 | -0.7553 | -0.7916 |
| Jan-93 | 2.0664 | -0.9307 |
| Feb-93 | -0.2935 | -1.1793 |
| Mar-93 | -1.8727 | -1.2986 |
| Apr-93 | -1.4822 | -1.2881 |
| May-93 | -0.9379 | -1.2287 |
| Jun-93 | -1.3557 | -1.1964 |
| Jul-93 | -2.8543 | -1.3128 |
| Aug-93 | -3.5506 | -1.4163 |
| Sep-93 | -1.9065 | -1.2954 |
| Oct-93 | -0.9076 | -1.4110 |
| Nov-93 | -0.3438 | -1.5717 |
| Dec-93 | -1.0818 | -1.3761 |
| Jan-94 | -0.3993 | -1.1071 |
| Feb-94 | -0.3122 | -0.7996 |
| Mar-94 | 1.0460 | -0.4846 |
| Apr-94 | -7.1746 | -0.2027 |
| May-94 | 0.8973 | 0.0841 |
| Jun-94 | 1.5050 | 0.7971 |
| Jul-94 | 0.7409 | 1.7332 |
| Aug-94 | 0.2323 | 2.4737 |
| Sep-94 | 1.8714 | 2.9238 |
| Oct-94 | 2.0816 | 3.4052 |
| Nov-94 | 3.5491 | 3.7940 |
| Dec-94 | 12.1382 | 3.7820 |
| Jan-95 | 8.8462 | 3.7614 |
| Feb-95 | 8.2140 | 3.8067 |
| Mar-95 | 3.3228 | 3.8624 |
| Apr-95 | 2.1026 | 3.6994 |
| May-95 | 0.9511 | 3.2815 |
| Jun-95 | 1.1615 | 2.4686 |
| Jul-95 | 0.5914 | 1.3621 |
| Aug-95 | 1.4679 | 0.3228 |
| Sep-95 | 1.9738 | -0.4115 |
| Oct-95 | -1.9330 | -0.8699 |
| Nov-95 | -2.4666 | -1.2368 |
| Dec-95 | -1.3543 | -1.5785 |
| Jan-96 | -4.2191 | -1.9244 |
| Feb-96 | -3.6621 | -2.2758 |
| Mar-96 | -2.4244 | -2.7215 |
| Apr-96 | -3.1520 | -3.0068 |
| May-96 | -2.5999 | -3.0412 |
| Jun-96 | -3.4891 | -3.1021 |
| Jul-96 | -3.0605 | -3.0812 |
| Aug-96 | -3.3130 | -2.8694 |
| Sep-96 | -3.9415 | -2.7687 |
| Oct-96 | -2.8650 | -2.6916 |
| Nov-96 | -2.3612 | -2.5287 |
| Dec-96 | -2.9198 | -2.4210 |
| Jan-97 | -2.1518 | -2.2375 |
| Feb-97 | -0.6477 | -1.9679 |
| Mar-97 | -3.0205 | -1.5972 |
| Apr-97 | -0.7067 | -1.1526 |
| May-97 | -1.1350 | -0.8198 |
| Jun-97 | -2.3692 | -0.4722 |
| Jul-97 | 0.2230 | -0.0350 |
| Aug-97 | -0.1249 | 0.3270 |
| Sep-97 | 1.7654 | 0.6939 |
| Oct-97 | 2.0991 | 1.0838 |
| Nov-97 | 0.6627 | 1.4400 |
| Dec-97 | 2.3985 | 1.8755 |
| Jan-98 | 3.0227 | 2.2830 |
| Feb-98 | 2.8647 | 2.5594 |
| Mar-98 | 2.2746 | 2.7123 |
| Apr-98 | 3.3548 | 2.7840 |
| May-98 | 3.3513 | 2.8956 |
| Jun-98 | 3.5985 | 2.9462 |
| Jul-98 | 4.0344 | 2.8913 |
| Aug-98 | 2.6972 | 2.8975 |
| Sep-98 | 2.6129 | 3.0066 |
| Oct-98 | 2.9726 | 3.0681 |
| Nov-98 | 2.4663 | 3.0338 |
| Dec-98 | 1.8099 | 2.9869 |
| Jan-99 | 2.2936 | 2.9134 |
| Feb-99 | 3.7442 | 2.9131 |
| Mar-99 | 4.0116 | 3.0506 |
| Apr-99 | 3.0938 | 3.2089 |
| May-99 | 2.7896 | 3.3797 |
| Jun-99 | 3.0349 | 3.6349 |
| Jul-99 | 2.8334 | 3.8841 |
| Aug-99 | 3.8910 | 4.0021 |
| Sep-99 | 4.7204 | 3.8222 |
| Oct-99 | 4.6644 | 3.3482 |
| Nov-99 | 4.8735 | 2.9052 |
| Dec-99 | 5.5265 | 2.5586 |
| Jan-00 | 4.5579 | 2.1405 |
| Feb-00 | 4.3113 | 1.7464 |
| Mar-00 | -0.8729 | 1.3107 |
| Apr-00 | -3.3972 | 0.7276 |
| May-00 | -1.3511 | 0.1531 |
| Jun-00 | -1.1432 | -0.4824 |
| Jul-00 | -3.0229 | -1.1077 |
| Aug-00 | 0.2883 | -1.6730 |
| Sep-00 | -2.1331 | -2.0498 |
| Oct-00 | -2.4755 | -2.1616 |
| Nov-00 | -1.7764 | -2.2345 |
| Dec-00 | -3.0752 | -2.3907 |
| Jan-01 | -1.8462 | -2.5594 |
| Feb-01 | -2.8519 | -2.7013 |
| Mar-01 | -2.7537 | -2.9160 |
| Apr-01 | -4.1987 | -3.1065 |
| May-01 | -2.3004 | -3.3012 |
| Jun-01 | -3.9410 | -3.5482 |
| Jul-01 | -4.2758 | -3.7724 |
| Aug-01 | -1.8629 | -3.9182 |
| Sep-01 | -5.1365 | -4.0539 |
| Oct-01 | -4.0437 | -4.1316 |
| Nov-01 | -4.8798 | -4.1154 |
| Dec-01 | -5.8996 | -4.0780 |
| Jan-02 | -4.4033 | -3.8974 |
| Feb-02 | -3.7948 | -3.7205 |
| Mar-02 | -5.0670 | -3.5414 |
| Apr-02 | -3.7499 | -3.2369 |
| May-02 | -2.3602 | -2.8843 |
| Jun-02 | -2.9838 | -2.4564 |
| Jul-02 | -0.8994 | -2.0961 |
| Aug-02 | -0.9938 | -1.9113 |
| Sep-02 | -1.7058 | -1.7370 |
| Oct-02 | -0.1670 | -1.5358 |
| Nov-02 | -0.2953 | -1.4717 |
| Dec-02 | -0.2133 | -1.5147 |
| Jan-03 | -1.4427 | -1.5715 |
| Feb-03 | -2.3194 | -1.6761 |
| Mar-03 | -2.3609 | -1.7369 |
| Apr-03 | -1.6269 | -1.7259 |
| May-03 | -2.9432 | -1.7571 |
| Jun-03 | -3.4343 | -1.7200 |
| Jul-03 | -1.8109 | -1.6096 |
| Aug-03 | -2.5926 | -1.3886 |
| Sep-03 | -1.5679 | -0.9923 |
| Oct-03 | -0.0394 | -0.5881 |
| Nov-03 | -1.1726 | -0.1877 |
| Dec-03 | 1.5550 | 0.2883 |
| Jan-04 | -0.5612 | 0.7505 |
| Feb-04 | 2.1033 | 1.1345 |
| Mar-04 | 2.7280 | 1.4774 |
| Apr-04 | 2.9844 | 1.7266 |
| May-04 | 2.0538 | 2.0310 |
| Jun-04 | 2.9926 | 2.2945 |
| Jul-04 | 2.8553 | 2.5261 |
| Aug-04 | 1.9572 | 2.7646 |
| Sep-04 | 2.1126 | 2.8440 |
| Oct-04 | 2.2618 | 2.8923 |
| Nov-04 | 3.8321 | 2.9644 |
| Dec-04 | 2.8738 | 2.9876 |
| Jan-05 | 3.6781 | 2.9354 |
| Feb-05 | 3.5873 | 2.9701 |
| Mar-05 | 3.1494 | 3.0298 |
| Apr-05 | 3.7216 | 2.9737 |
| May-05 | 3.0471 | 2.9664 |
| Jun-05 | 2.5579 | 2.9972 |
| Jul-05 | 2.0360 | 2.9188 |
| Aug-05 | 3.6095 | 2.7663 |
| Sep-05 | 1.8934 | 2.6511 |
| Oct-05 | 1.1337 | 2.5236 |
| Nov-05 | 4.7852 | 2.4899 |
| Dec-05 | 2.6610 | 2.6009 |
| Jan-06 | 2.0099 | 2.6559 |
| Feb-06 | 1.5949 | 2.5415 |
| Mar-06 | 2.3757 | 2.4699 |
| Apr-06 | 1.4352 | 2.5335 |
| May-06 | 4.5252 | 2.3456 |
| Jun-06 | 3.7446 | 2.0715 |
| Jul-06 | 2.1681 | 1.9368 |
| Aug-06 | 0.7324 | 1.8461 |
| Sep-06 | 3.0522 | 1.8224 |
| Oct-06 | 1.5023 | 1.8272 |
| Nov-06 | -0.0938 | 1.7266 |
| Dec-06 | 0.9627 | 1.5073 |
| Jan-07 | 0.4735 | 1.3081 |
| Feb-07 | 0.9551 | 1.2621 |
| Mar-07 | 2.4462 | 1.1779 |
| Apr-07 | 1.4815 | 1.1152 |
| May-07 | 2.0645 | 1.3062 |
| Jun-07 | 0.9409 | 1.4912 |
| Jul-07 | 0.1903 | 1.7490 |
| Aug-07 | 1.6072 | 2.1178 |
| Sep-07 | 0.1572 | 2.2397 |
| Oct-07 | 2.8919 | 2.3119 |
| Nov-07 | 3.1008 | 2.5108 |
| Dec-07 | 2.2084 | 2.6580 |
| Jan-08 | 5.4142 | 2.8807 |
| Feb-08 | 4.8668 | 3.0470 |
| Mar-08 | 1.4585 | 3.0515 |
| Apr-08 | 4.2017 | 2.9576 |
| May-08 | 4.1179 | 2.6184 |
| Jun-08 | 2.4223 | 2.0172 |
| Jul-08 | 4.0532 | 1.0930 |
| Aug-08 | 1.7339 | 0.0645 |
| Sep-08 | 0.1396 | -0.9087 |
| Oct-08 | 0.6556 | -2.0792 |
| Nov-08 | -2.8030 | -3.3912 |
| Dec-08 | -6.3168 | -4.5731 |
| Jan-09 | -8.2428 | -5.6099 |
| Feb-09 | -6.1595 | -6.5125 |
| Mar-09 | -10.8707 | -7.2132 |
| Apr-09 | -11.5629 | -7.8895 |
| May-09 | -11.6045 | -8.3710 |
| Jun-09 | -10.2200 | -8.4353 |
| Jul-09 | -8.1896 | -8.2106 |
| Aug-09 | -7.6844 | -7.8732 |
| Sep-09 | -7.2595 | -7.3054 |
| Oct-09 | -8.1750 | -6.4336 |
| Nov-09 | -5.5298 | -5.5282 |
| Dec-09 | -5.1318 | -4.6898 |
| Jan-10 | -4.0367 | -3.9842 |
| Feb-10 | -2.2665 | -3.3928 |
| Mar-10 | -1.1377 | -2.8276 |
| Apr-10 | -0.3731 | -2.2131 |
| May-10 | -1.0635 | -1.6638 |
| Jun-10 | -0.6405 | -1.2049 |
| Jul-10 | -0.8338 | -0.7204 |
| Aug-10 | -0.8481 | -0.3747 |
| Sep-10 | -0.5301 | -0.1194 |
| Oct-10 | -0.1564 | 0.0956 |
| Nov-10 | -0.3648 | 0.1814 |
| Dec-10 | 0.7172 | 0.2799 |
| Jan-11 | 1.7408 | 0.3775 |
| Feb-11 | 0.2545 | 0.4906 |
| Mar-11 | 2.4684 | 0.6737 |
| Apr-11 | 1.1810 | 0.8228 |
| May-11 | -0.5585 | 0.9646 |
| Jun-11 | 1.2182 | 1.2015 |
| Jul-11 | -0.3516 | 1.3392 |
| Aug-11 | 1.3854 | 1.3980 |
| Sep-11 | 1.6294 | 1.3756 |
| Oct-11 | 1.2627 | 1.2266 |
| Nov-11 | 1.6195 | 1.2517 |
| Dec-11 | 4.4182 | 1.3286 |
| Jan-12 | 1.3458 | 1.3538 |
| Feb-12 | 2.0597 | 1.3251 |
| Mar-12 | 0.1270 | 1.1502 |
| Apr-12 | -0.0543 | 0.8768 |
| May-12 | 1.2782 | 0.6079 |
| Jun-12 | 1.2274 | 0.2345 |
| Jul-12 | 0.2436 | -0.0404 |
| Aug-12 | 0.1030 | -0.1161 |
| Sep-12 | -1.2855 | -0.1501 |
| Oct-12 | -2.3847 | -0.1262 |
| Nov-12 | -1.1873 | -0.1423 |
| Dec-12 | -1.7354 | -0.1985 |
| Jan-13 | 0.9024 | -0.2380 |
| Feb-13 | 0.6861 | -0.2264 |
| Mar-13 | 0.6830 | -0.1498 |
| Apr-13 | -0.0357 | 0.0286 |
| May-13 | 0.8730 | 0.2825 |
| Jun-13 | 0.2844 | 0.5456 |
| Jul-13 | 0.2376 | 0.6007 |
| Aug-13 | 0.3888 | 0.4774 |
| Sep-13 | 0.2651 | 0.4247 |
| Oct-13 | 0.3467 | 0.4979 |
| Nov-13 | 2.1757 | 0.6057 |
| Dec-13 | 1.2152 | 0.6549 |
| Jan-14 | -0.7246 | 0.7085 |
| Feb-14 | -0.6466 | 0.7824 |
| Mar-14 | 0.7514 | 0.8734 |
| Apr-14 | 1.6523 | 1.0212 |
| May-14 | 1.7714 | 1.1405 |
| Jun-14 | 0.5677 | 1.2643 |
| Jul-14 | 1.2404 | 1.4708 |
| Aug-14 | 1.1605 | 1.5808 |
| Sep-14 | 1.6771 | 1.5765 |
| Oct-14 | 2.4812 | 1.4996 |
| Nov-14 | 2.9049 | 1.3391 |
| Dec-14 | 3.4562 | 1.2195 |
| Jan-15 | 1.9900 | 1.1450 |
| Feb-15 | -0.7195 | 1.0474 |
| Mar-15 | 0.7204 | 0.8936 |
| Apr-15 | -0.1633 | 0.6728 |
| May-15 | -0.2635 | 0.3306 |
| Jun-15 | -0.2685 | -0.1239 |
| Jul-15 | 0.2878 | |
| Aug-15 | -0.2296 | |
| Sep-15 | -0.6229 | |
| Oct-15 | -0.5171 | |
| Nov-15 | -2.3112 | |
| Dec-15 | -2.2353 |
NOTES: Detrending and smoothing refer to statistical procedures that make it easier to observe changes in upturns and downturns of the data. Detrending removes the long-term growth trend and smoothing eliminates month-to-month volatility.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, Transportation Services Index, available at www.bts.gov as of May 2016.