Table 1-26:  Class I Railroad Locomotive Fleet by Year Built (Locomotive units),,,,,,,,,,,
Year built a,1990 ,1991 ,1992 ,1993 ,1994 ,1995 ,1996 ,1997 ,1998 ,1999 ,2000 
Total,"18,835","18,344","18,004","18,161","18,505","18,812","19,269","19,684","20,261","20,256","20,028"
Before 1970,"5,117","4,353","4,038","3,766","3,535",b,b,b,b,b,f
1970-74,"3,852","3,617","3,384","3,248","3,184","c6,048","c5,783","c5,529","c5,565",c5196,f
1975-79,"4,432","4,375","4,292","4,352","4,275","4,254","4,274","4,219","4,116","4,000","g8,541"
1980-84,"2,837","2,826","2,784","2,730","2,625","2,754","2,735","2,728","2,723","2,581","2,411"
1985-89,"1,989","1,985","1,970","1,968","1,971","1,890","1,866","1,829","1,830","1,779","1,775"
1990,608,605,604,604,599,"d2,965","d2,959","d2,958","d2,736","d2,688","d2,648"
1991,,583,595,595,594,e,e,e,e,e,e
1992,,,337,340,339,e,e,e,e,e,e
1993,,,,558,602,e,e,e,e,e,e
1994,,,,,781,e,e,e,e,e,e
1995,,,,,,901,945,983,953,951,973
1996,,,,,,,707,696,708,706,697
1997,,,,,,,,742,741,743,745
1998,,,,,,,,,889,890,890
1999,,,,,,,,,,722,713
2000,,,,,,,,,,,635
a Disregards year of rebuilding.,,,,,,,,,,,
b Included in 1970-74 category.,,,,,,,,,,,
c Includes all locomotives built before 1975.,,,,,,,,,,,
d Includes locomotives built between 1990-94.,,,,,,,,,,,
e Included in 1990 category.,,,,,,,,,,,
f Included in 1975-79 category.,,,,,,,,,,,
g Includes all locomotives built before 1980.,,,,,,,,,,,
,,,,,,,,,,,
"SOURCE:  Association of American Railroads, Railroad Facts (Washington, DC: Annual issues).",,,,,,,,,,,