Table 1-30: Age and Availability of Amtrak Locomotive and Car Fleets ,,,,,,,, ,1972,1975,1980,1985,1990,1995,2000,2001 Locomotives,,,,,,,, Percent available for servicea,N,87,83,93,84,88,89,U Average age (years)b,22.3,14.4, 7.4, 7.0,12.0,13.9,11.2,U Passenger and other train cars,,,,,,,, Percent available for servicea,N,82,77,90,90,90,91,U Average age (years)b,22.0,24.7,14.3,14.2,20.0,21.8,19.4,U KEY: N = data do not exist; U = data are not available.,,,,,,,, ,,,,,,,, a Year-end daily average. Active units less backshop units undergoing heavy maintenance less back-ordered units undergoing progressive maintenance and running repairs.,,,,,,,, b Year-end average.,,,,,,,, ,,,,,,,, NOTE,,,,,,,, 1972 was Amtrak's first full fiscal year of operation.,,,,,,,, ,,,,,,,, SOURCES,,,,,, "1972-80: Amtrak, Amtrak Annual Report (Washington, DC: Annual issues).",,,,,, "1985-2000: Ibid., Amtrak Annual Report, Statistical Appendix (Washington, DC: Annual issues).",,,,,, ,,,,,,