Total entries: 324725 Books: 11039 Journal Articles: 258674 Proceedings Articles: 55012
| Year(s) | Total | Books & | Journal | Proceedings/ | |
| Entries | Proceedings | Articles | Edited book | ||
| Volumes | Articles | ||||
| Up to 1974 | 15974 | 57 | 15025 | 892 | |
| 1975 - 1980 | 33772 | 2036 | 25290 | 6446 | |
| 1981 - 1990 | 80654 | 4517 | 58548 | 17589 | |
| 1991 - 2000 | 99153 | 3776 | 77413 | 17964 | |
| 2001 - 2005 | 48821 | 572 | 40760 | 7489 | |
| 2006 | 9644 | 19 | 7858 | 1767 | |
| 2007 | 8056 | 15 | 7194 | 847 | |
| 2008 | 8706 | 23 | 7740 | 943 | |
| 2009 | 8279 | 7 | 7608 | 664 | |
| 2010 | 7139 | 15 | 6778 | 346 | |
| 2011 | 4382 | 2 | 4315 | 65 |
Journals indexed: 2147
