- 1996 to 1996 1,612
- 1997 to 1997 1,256
- 1998 to 1998 1,191
- 1999 to 1999 1,141
- 2000 to 2000 1,089
- 2001 to 2001 535
- 2002 to 2002 435
- 2003 to 2003 142
- 2004 to 2004 65
- 2005 to 2005 39
- 2006 to 2006 50
- 2007 to 2007 30
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