- 1954 to 1954 4
- 1955 to 1959 75
- 1960 to 1964 163
- 1965 to 1969 217
- 1970 to 1974 228
- 1975 to 1979 293
- 1980 to 1984 290
- 1985 to 1989 285
- 1990 to 1994 278
- 1995 to 1999 261
- 2000 to 2002 119
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