Table 6. Combined TSI - Percentage Changes Due to:,,,,
Date,"Changes
in Source Data","Changes
in Seasonal Factors","Changes
in Weights/
Methodology",All Changes
Dec-06,0.67,0.18,-0.81,0.04
Nov-06,0.72,0.14,-0.83,0.02
Oct-06,0.67,0.25,-0.86,0.05
Sep-06,0.68,0.22,-1.08,-0.19
Aug-06,0.71,0.16,-0.85,0.01
Jul-06,0.48,0.15,-0.68,-0.06
Jun-06,0.75,-0.13,-0.53,0.09
May-06,0.77,0.13,-0.71,0.19
Apr-06,0.39,0.28,-0.94,-0.28
Mar-06,0.56,-0.18,-0.89,-0.51
Feb-06,0.41,0.61,-0.74,0.27
Jan-06,0.24,0.40,-0.41,0.23
Dec-05,0.05,0.27,-0.63,-0.31
Nov-05,0.10,0.62,-0.40,0.32
Oct-05,-0.15,0.23,-0.47,-0.40
Sep-05,-0.07,-0.05,-0.45,-0.57
Aug-05,0.15,0.02,-0.53,-0.36
Jul-05,-0.52,-0.17,-0.63,-1.32
Jun-05,-0.33,-0.18,-0.57,-1.08
May-05,-0.51,-0.24,-0.55,-1.30
Apr-05,-0.45,-0.20,-0.47,-1.12
Mar-05,-0.63,0.12,-0.47,-0.98
Feb-05,-0.48,1.29,-0.42,0.39
Jan-05,-0.37,0.39,-0.40,-0.38
January 2005-December 2006,,,,
Average,0.16,0.18,-0.64,-0.30
Minimum,-0.63,-0.24,-1.08,-1.32
  Date of Min,Mar-05,May-05,Sep-06,Jul-05
Maximum,0.77,1.29,-0.40,0.39
  Date of Max,May-06,Feb-05,Nov-05,Feb-05
Prior Years:,,,,
January 2002-December 2004,,,,
Average,-0.12,0.04,-0.19,-0.27
Minimum,-0.49,-0.33,-0.44,-0.93
  Date of Min,Sep-04,Jul-04,Oct-04,Jun-04
Maximum,0.20,0.72,-0.02,0.37
  Date of Max,Sep-02,Feb-03,Sep-02,Feb-03
January 1990-December 2001,,,,
Average,-0.04,0.01,0.03,0.00
Minimum,-0.62,-0.85,-0.65,-1.19
  Date of Min,Mar-91,Feb-96,Dec-94,Feb-96
Maximum,0.38,0.46,1.12,1.24
  Date of Max,Nov-00,Dec-01,Jan-90,Feb-90
Source: Bureau of Transportation Statistics,,,,