- 19766,136
- 1977 to 19798,488
- 1980 to 19813,585
- 1982 to 19844,555
- 1985 to 19865,130
- 1987 to 19894,710
- 1990 to 19911,989
- 1992 to 19943,824
- 1995 to 19963,517
- 1997 to 19993,195
- 2000 to 20011,785
- 2002572
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