Total entries: 291345 Books: 10965 Journal Articles: 227928 Proceedings Articles: 52452
| Year(s) | Total | Books & | Journal | Proceedings/ | |
| Entries | Proceedings | Articles | Edited book | ||
| Volumes | Articles | ||||
| Up to 1974 | 15946 | 54 | 15000 | 892 | |
| 1975 - 1980 | 33734 | 2036 | 25252 | 6446 | |
| 1981 - 1990 | 80551 | 4517 | 58445 | 17589 | |
| 1991 - 2000 | 98841 | 3776 | 77101 | 17964 | |
| 2001 | 10329 | 296 | 8346 | 1687 | |
| 2002 | 10084 | 185 | 8050 | 1849 | |
| 2003 | 9264 | 50 | 7537 | 1677 | |
| 2004 | 8737 | 32 | 7325 | 1380 | |
| 2005 | 7309 | 8 | 6485 | 816 | |
| 2006 | 7606 | 6 | 6083 | 1517 | |
| 2007 | 5434 | 4 | 4795 | 635 | |
| 2008 | 3378 | 1 | 3377 | 0 |
Journals indexed: 2032
