Number of Books
Books up to 2005	Added	Total
up to 2005	1941	1941
2005 - 2006	269	2210
2006 - 2007	229	2439
2007 - 2008	484	2923
2008 - 2009	1517	4440
2009 - 2010	1015	5455
2010 - 2011	633	6088