Year,Group,Years
1920,WM,54.4
1920,WF,55.6
1920,BM,45.5
1920,BF,45.2
1930,WM,59.7
1930,WF,63.5
1930,BM,47.3
1930,BF,49.2
1940,WM,62.1
1940,WF,66.6
1940,BM,51.5
1940,BF,54.9
1950,WM,66.5
1950,WF,72.2
1950,BM,59.1
1950,BF,62.9
1960,WM,67.4
1960,WF,74.1
1960,BM,61.1
1960,BF,66.3
1970,WM,68.0
1970,WF,75.6
1970,BM,61.3
1970,BF,69.4
1980,WM,70.7
1980,WF,78.1
1980,BM,65.3
1980,BF,73.6
1990,WM,72.9
1990,WF,74.4
1990,BM,67.0
1990,BF,75.2