All Duke Libraries Supplementary Statistics
2010-2011 Fiscal Year
Volume and Title Count Metrics
Number of electronic books held601,882
Electronic Books
Expenditures for ebooks$658,103
Services
Virtual Reference Transactions (ARL only)33,798
Use of Networked Electronic Resources
ARL S6 Number of sessions (logins) to databases or services381,622
ARL S6a Number of resources for which you are reporting220
ARL S7 Number of searches (queries) in databases or services1,604,034
ARL S7a Number of resources for which you are reporting12
Number of successful full-text article requests207,213
ARL S8a Number of resources for which you are reporting426
ARL S9a Number of virtual visits to library's website9,413,821
ARL S9b Number of virtual visits to library's catalog1,015,522
Total Number of Virtual Visits (9a + 9b)10,429,343
Number and Size of Library Digital Collections
S10a. Number of Collections197
S10b. Size (in gigabytes)546,012.40
S10c. Items203,401
Use of Library Digital Collections
S11a. Number of times items accessed5,000,900
S11b. Number of queries conducted267,348
Direct cost of digital collections construction and management
S12a. Direct cost of personnel$111,360
S12b. Direct cost of equipment, software or contracted services$264,491