| 1997/98 | 1998/99 | 1999/00 | 2000/01 | 2001/02 | |
| Volumes | |||||
| Monograph volumes added | 14,356 | 9,562 | 11,262 | 8,822 | 11,282 |
| Serial and bound periodical volumes added | 4,109 | 3,840 | 3,473 | 3,983 | 4,617 |
| SUBTOTAL | 18,465 | 13,402 | 14,735 | 12,805 | 15,899 |
| Volumes withdrawn | 2,559 | 2,325 | 1,730 | 42,5541 | 177 |
| TOTAL CATALOGED VOLS | 821,308 | 832,385 | 845,392 | 815,643 | 831,365 |
| Government documents | 444,507 | 447,963 | 458,800 | 462,987 | 467,963 |
| TOTAL NUMBER OF VOLS | 1,268,815 | 1,282,023 | 1,305,602 | 1,279,380 | 1,299,328 |
| Non-book materials | |||||
| Sound recordings | 17,360 | 17,365 | 17,429 | 17,661 | 17,753 |
| Videocassettes | 2,074 | 2,092 | 2,278 | 2,351 | 2,406 |
| Audiocassettes | 869 | 869 | 870 | 930 | 958 |
| Multimedia and CD-ROMS | 9512 | 1,144 | 1,154 | 1,309 | 1,314 |
| TOTAL CATALOGED NON-BOOK MATERIALS | 21,246 | 21,470 | 21,731 | 22,251 | 22,431 |
| Microform pieces | 1,576,998 | 1,603,748 | 1,624,712 | 1,639,385 | 1,650,882 |
| Archives and manuscripts (in cubic feet) | 4,133 | 4,380 | 4,690 | 4,908 | 5,693 |
| Print and serial subscriptions | 4,243 | 4,213 | 4,167 | 4,112 | 4,025 |
| Electronic Subscriptions | 15,885 | 16,000 |
1 Includes items withdrawn following the 1998/1999 Inventory.
2 First year in which CD-ROMS are included in this category.