Table 1.

Counts of abstracts, by year

Jan-June 2013	8983
2010-2012	50638
2007-2009	39359
2004-2006	32298
2001-2003	25357
1998-2000	22641
1995-1997	19342
1992-1994	15976
1989-1991	12887
1986-1988	7445
Total	234926