web link: http://www.b-b.ne.jp/kaigun/zuikaku
See also : World War II, List of ships of Japanese navy
... 18 to 24, 27.3% from 25 to 44, 28.7% from 45 to 64, and 13.9% who are 65 years of age or older. The median age is 41 years. For every 100 females there are 98.0 males. ...