TABLE 55  Crossties Installed or Replaced by U.S. Class I Railroads: 1990–2001,,,,,,,,,,,,
(Millions of crossties),,,,,,,,,,,,
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,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001
Replaced crossties,14.1,12.6,13.5,12.8,12.3,12.1,13.4,11.9,10.4,10.8,10.8,11.4
Installed crossties,0.2,0.2,0.2,0.4,0.6,0.7,0.8,1.5,1.8,1.3,0.7,0.5
"
SOURCE: Association of American Railroads, Railroad Ten-Year Trends, 1990–2000 (Washington, DC: 2000); 2000–2001—Association of American Railroads, Analysis of Class I Railroads (Washington, DC: 2000 and 2001).",,,,,,,,,,,,