About Collection Statistics Data

The collection statistics presented here are based on circulation transactions for volumes held by the UW-Madison Libraries and full text downloads of book chapters for e-book subscriptions. The circulation statistics are based on the transactions originating within the Voyager Integrated Library System (ILS) during fiscal years 2006-2015 (July 1, 2005 - May 20, 2015). The UW-Madison Libraries migrated off this ILS in May 2015.

Circulation and item counts are limited to circulating collections. For example, most reference collections are not included in the volume counts presented here because their volumes cannot be checked out.

Revisions

February 2017: changed the calculations from counting loaned titles to counting loaned volumes. The effect of this change will be seen in the number of circulations associated with "boundwith" titles. Rather than counting each bound title loaned separately, this process will count the entire loaned volume once. Current version.

February 2016: bug fix for double counting items that have circulated when calculating the size of a circulating collection. The effect that this had was to make each library's circulating collection look like it contained extra items. This therefore raised the percentage of volumes that never circulated. See 201602.

January 2016: initial version. See 201601.