Table 2.  Percentage Changes in the TSIs due to Changes in Weights/Methodology,,,
Date,Freight,Passenger,Combined
Dec-06,-0.52,0.10,-0.81
Nov-06,-0.55,0.09,-0.83
Oct-06,-0.58,0.09,-0.86
Sep-06,-0.85,0.06,-1.08
Aug-06,-0.54,0.05,-0.85
Jul-06,-0.45,0.06,-0.68
Jun-06,-0.47,0.04,-0.53
May-06,-0.55,-0.01,-0.71
Apr-06,-0.53,-0.02,-0.94
Mar-06,-0.58,0.02,-0.89
Feb-06,-0.51,0.04,-0.74
Jan-06,-0.23,0.14,-0.41
Dec-05,-0.60,-0.08,-0.63
Nov-05,-0.37,0.02,-0.40
Oct-05,-0.40,0.03,-0.47
Sep-05,-0.32,0.03,-0.45
Aug-05,-0.50,0.02,-0.53
Jul-05,-0.59,0.01,-0.63
Jun-05,-0.53,-0.01,-0.57
May-05,-0.50,-0.06,-0.55
Apr-05,-0.47,0.05,-0.47
Mar-05,-0.46,-0.01,-0.47
Feb-05,-0.43,0.04,-0.42
Jan-05,-0.48,0.07,-0.40
Summary January 2005-December 2006,,,
Average,-0.50,0.03,-0.64
Minimum,-0.85,-0.08,-1.08
  Date of Min,Sep-06,Dec-05,Sep-06
Maximum,-0.23,0.14,-0.40
  Date of Max,Jan-06,Jan-06,Nov-05
Summary of Prior Years:,,,
January 2002-December 2004,,,
Average,-0.16,0.15,-0.19
Minimum,-0.47,-0.04,-0.44
  Date of Min,Dec-04,Jan-02,Oct-04
Maximum,0.11,0.24,-0.02
  Date of Max,Sep-02,Dec-02,Sep-02
January 1990-December 2001,,,
Average,0.71,0.18,0.03
Minimum,-0.27,-0.35,-0.65
  Date of Min,Jan-98,Sep-01,Dec-94
Maximum,2.84,0.62,1.12
  Date of Max,May-90,Mar-91,Jan-90
Source: Bureau of Transportation Statistics,,,