Figure 4 Truck Ton-Miles,,
Ton-miles (billions),,
Year,"NTS, Eno",Improved BTS
1990,735,854
1991,758,874
1992,815,896
1993,861,936
1994,908,996
1995,921,"1,042"
1996,972,"1,071"
1997,996,"1,119"
1998,"1,027","1,149"
1999,"1,059","1,186"
2000,"1,074","1,203"
2001,"1,051","1,224"
2002,,"1,255"
2003P,,"1,264"
Key: p = preliminary.,,