Pre-1914 Male Population in Selected Countries
I have not included data for Imperial Russia simply because there is no, accurate government data available. The only census was carried out in 1897.
Sources: B. R. Mitchell, International Historical Statistics: Europe, 1750-2005, 6th ed. (New York: Palgrave, 2007) and U.S. Bureau of the Census, Historical Statistics of the United States, Colonial Times to 1970 (Washington: USGPO, 1975)