- 1980 to 1981 3,047
- 1982 to 1983 2,641
- 1984 to 1985 3,880
- 1986 to 1987 3,951
- 1988 to 1989 2,047
- 1990 to 1991 1,641
- 1992 to 1993 1,601
- 1994 to 1995 1,920
- 1996 to 1997 2,431
- 1998 to 1998 1,152
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