Year	Number of
1989	0.06717
1992	0.09118
1994	1.13
1998	0.3804
1999	0.6494
2001	0.5444
2002	0.5715
2003	0.3387
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0