Table 23,,,, Employment in Transportation and Selected Transportation-Related Industriesa ,,,, (Thousands),,,, ,1990,1995,2000,2004 For-hire transport & warehousing,"3,476","3,839","4,410","4,250" Air,529,511,614,515 Water,57,51,56,57 Railroad,272,233,232,224 Transit/ground passenger transportation ,274,328,372,386 Pipeline,60,54,46,39 Trucking,"1,122","1,249","1,406","1,351" Support activities,364,430,537,536 Scenic/sightseeing transportation,16,22,28,27 Couriers/messengers,375,517,605,561 Warehousing/storage,407,444,514,556 Governmentb,671,644,646,600 Related services & construction,"5,256","5,577","6,177","5,999" Automotive repair services/parking; automotive equipment rental/leasing; gasoline stations ,"1,800","1,906","2,125","2,067" "Highway, street, bridge construction ",289,278,340,348 "Dealers or wholesalers of motor vehicles, parts, petroleum, supplies, equipment","1,993","2,119","2,360","2,374" Travel arrangement/reservation services,250,281,299,226 Ambulatory health care services,99,143,173,201 Postal service,825,850,880,784 Transportation-related manufacturingc,"2,681","2,390","2,446","2,123" Total,"12,084","12,450","13,679","12,972" a Annual averages. Data are NAICS-based. (See Glossary for definition.) ,,,, b Fiscal year data. Includes U.S. DOT and state and local highway personnel. ,,,, "c Includes transportation equipment; petroleum products; tires; rubber; plastics; search, detection, navigation, guidance, aeronautical, and nautical systems; and instrument manufacturing.",,,, "Sources: Various sources, as cited in USDOT, RITA, BTS, National Transportation Statistics, table 3-19b, available at www.bts.gov, as of October 2005.",,,,