| Duke University Libraries, 2010-2011 ARL Statistics |
| Volume and Title Count Metrics |
| Volumes held (as of June 30 reporting year) | 6,340,456 |
| Volumes held (on June 30 previous year) | 6,172,978 |
| Volumes Added (Net) | 88,347 |
| Volumes Added (Gross) | 90,431 |
| Volumes withdrawn since June 30 previous year (0 or neg #) | -2,084 |
| Titles Held | 3,658,872 |
| Number of monographic volumes purchased | 64,982 |
| Volumes held in the LSC | 221,395 |
| Serial Volumes Added | 10,012 |
| Serial Volumes Withdrawn (0 or neg #) | -300 |
| Serials |
| Current Serials Total | 156,988 |
| Electronic (deduplicated) | 104,481 |
| Print (and other non-electronic format) serials purchased | 10,492 |
| Serials Purchased | 114,973 |
| Freely accessible | 38,898 |
| Print (and other format) - Exchanges, gifts, etc. | 1,851 |
| Government documents | 1,266 |
| Serials Not Purchased | 42,015 |
| Other Materials |
| Manuscripts (count) | 22,548,804 |
| Manuscripts added (count) | 1,452,162 |
| Microform Units | 4,430,439 |
| Government Documents not counted elsewhere | 1,264,760 |
| Computer Files | 103,053 |
| Manuscripts and Archives (linear ft.) | 64,609 |
| Cartographic Materials | 133,718 |
| Graphic Materials | 987,150 |
| Audiovisual Materials |
| Audio Materials | 67,783 |
| Film and Video Materials | 95,732 |
| Expenditures |
| Monographs | $5,619,981 |
| Current Serials | $10,621,724 |
| Other Library Materials | $170,780 |
| Miscellaneous Expenditures | $1,699,909 |
| Total Library Materials (calculated field) | $9,424,484 |
| Contract Binding | $124,872 |
| Salaries & Wages Professional Staff | $11,093,728 |
| Salaries & Wages Support Staff | $4,180,003 |
| Salaries & Wages Student Assistants | $439,003 |
| Total Salaries & Wages | $15,712,734 |
| Other Operating Expenditures | $5,347,158 |
| Total Library Expenditures | $30,484,376 |
| One-time electronic resource purchases | $568,105 |
| Ongoing electronic resource purchases | $8,856,379 |
| Total Electronic Materials Expenditures | $1,310,286.00 |
| From internal library sources | $418,157 |
| Expenditures From External Sources | $6,088 |
| Bibliographic Utilities, Networks, and Consortia (internal and external) | $424,245 |
| Computer Hardware and Software | $826,484 |
| Document Delivery/Interlibrary Loan | $59,557 |
| Electronic Resources |
| Staffing |
| Professional Staff (FTE) | 182.00 |
| Support Staff (FTE) | 118.00 |
| Student Assistants (FTE) | 22.00 |
| Total Staff (FTE) | 322.00 |
| Circulation |
| Initial Circulation Transactions (excluding reserves) | 470,262 |
| Total Circulation Transactions (initial and renewals, excluding reserves) | 669,321 |
| Returnable loans | 19,110 |
| Non-Returnable loans | 14,409 |
| Total Items Loaned (ILL) | 33,519 |
| Returnable Received | 18,524 |
| Non-Returnable Received | 8,748 |
| Total Items Borrowed (ILL) | 27,272 |
| Documents Delivered from Commercial Services | 6 |
| Gate Count in a Typical Week | 75,715 |
| Services |
| Reference Transactions (Total, ARL method) | 109,692 |
| Staffed Service Points | 19 |
| Weekly Public Service Hours | 168 |
| Presentations to Groups | 1,045 |
| Participants in Group Presentations | 16,918 |