Table 3. Basic statistics of SFN data for the 6-year period between 2001 and 2006.

Year	Number of Authors	Number of Abstracts	Avg. Abstracts Per Author	Avg. Authors Per Abstract	Avg. Num. of Collaborators
2001	42318	15340	1.55	4.28	5.82
2002	37129	13307	1.53	4.21	5.51
2003	41349	15261	1.58	4.29	5.90
2004	43853	15987	1.59	4.37	6.09
2005	39622	13669	1.50	4.35	5.88
2006	39645	13979	1.54	4.33	5.96
2001–2006	128553	87543	2.93	4.31	8.62