ISI Statistics

Some numbers based on a 23 Oct 2009 pass through the data:

Total articles: 24,943,242
Total articles that can be linked (have T9 field): 24,389,467
Total items in reference lists: 478,228,185
Average references per article: 19.2
Total authors: 87,481,839
Total unique authors (Full last name + all initials): 7,687,036
Total unique subject categories: 618
Average subject categories per article: 1.5