Year	Number of
1988	0.0032
1993	0.6875
1996	0.7758
2001	0.9093
2002	0.5587
2003	0.3593
2004	0.2177
2005	0.00303
2006	0.06276
2007	0.02477
2008	0.00157
2010	0.00979