Date,Flights not arriving on-time (percent)
Sep-87,22.91
Oct-87,19.61
Nov-87,23.84
Dec-87,33.49
Jan-88,30.65
Feb-88,25.24
Mar-88,21.10
Apr-88,17.33
May-88,18.03
Jun-88,15.62
Jul-88,18.46
Aug-88,17.04
Sep-88,14.37
Oct-88,16.60
Nov-88,22.34
Dec-88,23.86
Jan-89,23.32
Feb-89,27.58
Mar-89,30.38
Apr-89,16.61
May-89,20.54
Jun-89,27.82
Jul-89,23.13
Aug-89,25.37
Sep-89,20.39
Oct-89,20.54
Nov-89,21.98
Dec-89,29.80
Jan-90,22.40
Feb-90,26.78
Mar-90,23.46
Apr-90,17.79
May-90,19.16
Jun-90,19.94
Jul-90,18.94
Aug-90,21.46
Sep-90,15.59
Oct-90,17.58
Nov-90,15.43
Dec-90,29.70
Jan-91,26.17
Feb-91,18.15
Mar-91,19.99
Apr-91,16.62
May-91,16.50
Jun-91,14.72
Jul-91,15.51
Aug-91,16.73
Sep-91,12.10
Oct-91,16.61
Nov-91,17.28
Dec-91,20.04
Jan-92,18.61
Feb-92,16.57
Mar-92,19.10
Apr-92,13.40
May-92,13.45
Jun-92,18.96
Jul-92,20.22
Aug-92,19.66
Sep-92,14.81
Oct-92,14.19
Nov-92,17.32
Dec-92,26.11
Jan-93,22.37
Feb-93,23.15
Mar-93,26.39
Apr-93,17.08
May-93,12.89
Jun-93,16.75
Jul-93,13.94
Aug-93,15.88
Sep-93,15.37
Oct-93,16.96
Nov-93,18.82
Dec-93,21.39
Jan-94,29.53
Feb-94,26.17
Mar-94,17.44
Apr-94,16.97
May-94,12.37
Jun-94,18.23
Jul-94,20.55
Aug-94,16.25
Sep-94,12.05
Oct-94,14.07
Nov-94,19.25
Dec-94,20.75
Jan-95,26.17
Feb-95,21.09
Mar-95,20.70
Apr-95,18.70
May-95,19.32
Jun-95,24.06
Jul-95,19.92
Aug-95,20.15
Sep-95,14.42
Oct-95,17.91
Nov-95,22.15
Dec-95,32.34
Jan-96,37.33
Feb-96,28.10
Mar-96,24.06
Apr-96,19.82
May-96,21.08
Jun-96,25.33
Jul-96,24.71
Aug-96,25.31
Sep-96,21.31
Oct-96,22.81
Nov-96,22.09
Dec-96,33.37
Jan-97,31.59
Feb-97,24.79
Mar-97,21.90
Apr-97,20.15
May-97,16.84
Jun-97,23.86
Jul-97,22.50
Aug-97,21.44
Sep-97,14.97
Oct-97,18.45
Nov-97,21.78
Dec-97,26.46
Jan-98,24.95
Feb-98,24.61
Mar-98,24.15
Apr-98,20.88
May-98,22.52
Jun-98,29.58
Jul-98,21.14
Aug-98,22.97
Sep-98,21.06
Oct-98,18.25
Nov-98,16.71
Dec-98,26.78
Jan-99,32.34
Feb-99,21.09
Mar-99,21.91
Apr-99,24.27
May-99,23.81
Jun-99,29.12
Jul-99,28.93
Aug-99,23.89
Sep-99,20.65
Oct-99,19.94
Nov-99,18.59
Dec-99,22.00
Jan-00,26.25
Feb-00,25.24
Mar-00,23.01
Apr-00,24.63
May-00,25.75
Jun-00,33.66
Jul-00,29.69
Aug-00,30.04
Sep-00,21.90
Oct-00,23.77
Nov-00,27.18
Dec-00,37.25
Jan-01,24.58
Feb-01,27.27
Mar-01,24.78
Apr-01,20.71
May-01,18.53
Jun-01,24.82
Jul-01,21.88
Aug-01,23.82
Sep-01,32.34
Oct-01,15.22
Nov-01,15.29
Dec-01,19.78
Jan-02,18.98
Feb-02,15.31
Mar-02,21.41
Apr-02,17.42
May-02,17.24
Jun-02,21.36
Jul-02,20.34
Aug-02,17.38
Sep-02,12.05
Oct-02,15.82
Nov-02,14.79
Dec-02,21.66
Jan-03,16.68
Feb-03,23.46
Mar-03,17.43
Apr-03,13.14
May-03,15.04
Jun-03,17.62
Jul-03,20.30
Aug-03,20.97
Sep-03,14.36
Oct-03,13.61
Nov-03,19.79
Dec-03,23.95
Jan-04,25.13
Feb-04,22.50
Mar-04,18.71
Apr-04,16.95
May-04,22.36
Jun-04,26.99
Jul-04,24.01
Aug-04,21.69
Sep-04,16.06
Oct-04,18.98
Nov-04,20.84
Dec-04,28.40
Jan-05,28.59
Feb-05,22.36