- 1977 to 19797,996
- 1980 to 19813,308
- 1982 to 19844,240
- 1985 to 19864,855
- 1987 to 19894,399
- 1990 to 19911,700
- 1992 to 19942,350
- 1995 to 19962,607
- 1997 to 19992,866
- 2000 to 20011,560
- 2002 to 2003538
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