Year	Number of
1996	0.2179
1997	0.7939
1998	0.5995
1999	0.7654
2000	0.7842
2001	0.7641
2002	0.6183
2003	0.6762
2004	0.6525
2005	0.6481
2006	0.61
2007	0.6473
2008	0.6159
2009	0.6171
2010	0.8033
2011	0.7196
2012	0.635