Year	Number of
1988	0.00811
1993	0.00205
1995	0.0367
1998	0.08458
1999	0.03813
2000	0.02601
2001	0.01191
2002	0.04637
2003	0.04899
2004	0.00584
2005	0.0058
2006	0.0048
2007	0
2008	0
2009	0.00095
2010	0
2011	0