1850 _______ 50,000
1890 _______ 180,000
1895 _______ 217,000
1900 _______ 255,000
1905 _______ 287,000
1910 _______ 330,000
1915 _______ 360,000
1920 _______ 390,000
1925 _______ 398,000
1930 _______ 405,000
1935 _______ 427,000
1940 _______ 450,000
1945 _______ 475,000
1950 _______ 500,000
1955 _______ 525,000
1960 _______ 550,000
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