|Ship captains and mates, except fishing boats||32||24||22||31||38|
|Sailors and deckhands||25||21||30||16||14|
|Bridge, lock, and lighthouse tenders||5||5||8||5||3|
NOTE: Beginning in January 1998, data are not comparable with data for 1997 and earlier years due to the new composite estimation procedures and revised population controls used in the household survey.
SOURCE: Source cited in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics 2001, in press, to appear on the BTS website in summer 2002.