- 1890 to 18912,972
- 1892 to 18942,573
- 1895 to 18962,570
- 1897 to 18993,058
- 1900 to 19012,926
- 1902 to 19042,490
- 1905 to 19062,529
- 1907 to 19092,807
- 1910 to 19112,822
- 1912 to 19143,299
- 1915 to 19162,938
- 19173,808
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