Year	Number of
1988	0.00219
1993	0.07918
1996	0
1998	0.00426
2000	0.0021
2001	0.01041
2002	0.00551
2003	0.00239
2004	0.00203
2005	0.05682
2006	0.04578
2008	0.0016
2010	0.04584
2011	0.02513