- 1976 to 1976 2
- 1977 to 1979 2
- 1980 to 1981 2
- 1982 to 1984 3
- 1985 to 1986 2
- 1987 to 1989 3
- 1990 to 1991 4
- 1992 to 1994 13
- 1995 to 1996 8
- 1997 to 1999 11
- 2000 to 2001 7
- 2002 to 2002 1
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