Minnesota Digital Library
- 1900 to 19045,247
- 1905 to 19096,083
- 1910 to 19146,729
- 1915 to 19195,694
- 1920 to 19245,273
- 1925 to 19293,761
- 1930 to 19343,446
- 1935 to 19395,443
- 1940 to 19443,762
- 1945 to 19492,739
- 1950 to 19542,508
- 1955 to 19591,582
- 1960 to 19611,062