- 1998 to 19992,147
- 2000 to 20011,758
- 2002 to 2003726
- 2004 to 2005280
- 2006 to 2007231
- 2008 to 2009207
- 2010 to 2011644
- 2012 to 2013615
- 2014 to 2015204
- 2016 to 2017571
- 201834
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