- 1863 to 18692
- 1870 to 18790
- 1880 to 18890
- 1890 to 189917
- 1900 to 190993
- 1910 to 1919143
- 1920 to 1929373
- 1930 to 19391,354
- 1940 to 19492,136
- 1950 to 19591,797
- 1960 to 19693,543
- 1970 to 19792,288
- 1980 to 19891,241
- 1990 to 199919
The preservation of the Duke University Libraries Digital Collections and the Duke Digital Repository programs are supported in part by the Lowell and Eileen Aptman Digital Preservation Fund