Year	Number of
1988	0.9119
1992	0.01565
1995	1.01
1996	0.9854
1999	1.008
2002	0.2025
2003	0.05259
2004	0.01898
2005	0.02355
2006	0.0655
2007	0.02791
2008	0
2009	0.02763
2010	0