Table 3: Percent Changes in the Transportation Services Index from Previous Years to 2004,, "May to May ",, Percent change to May 2004,Since May,Duration 8.5,2003,One Year 8.7,2002,Two Years 7.7,2001,Three Years 7.8,2000,Four Years 7.9,1999,Five Years 10.3,1998,Six Years 18.4,1997,Seven Years 24.3,1996,Eight Years SOURCE: Bureau of Transportation Statistics,, ,, ,, ,, ,,