Year	Annual Number
1970	0
1971	0
1972	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	200
1991	0
1992	0
1993	0
1994	0
1995	0
1996	9751
1997	0
1998	8234
1999	0
2000	0
2001	0
2002	63
2003	23
2004	93
2005	99
2006	0
2007	27
2008	0