- 1980 to 19813,548
- 1982 to 19844,516
- 1985 to 19865,098
- 1987 to 19894,657
- 1990 to 19911,948
- 1992 to 19943,755
- 1995 to 19963,456
- 1997 to 19993,084
- 2000 to 20011,690
- 2002509
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