- 1990 to 199139
- 1992 to 199341
- 1994 to 199555
- 1996 to 199748
- 1998 to 199933
- 2000 to 200132
- 2002 to 200321
- 2004 to 20059
- 2006 to 20073
- 2008 to 20092
- 2010 to 20113
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