Table 1.

Population characteristics as to work category and gender

	N (%)	Mean age (years)	Men N (%)	Women N (%)
Total	1963 (100%)	43	1462 (90%)	158 (10%)
Deck	1094 (61%)	42	893	89
Engine	551 (31%)	43	488	19
Service	124 (7%)	47	72	47
Other	12 (1%)	41	9	3