- 1998 to 19992,172
- 2000 to 20011,783
- 2002 to 2003760
- 2004 to 2005318
- 2006 to 2007239
- 2008 to 2009230
- 2010 to 2011671
- 2012 to 2013626
- 2014 to 2015219
- 2016 to 2017586
- 201836
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