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	352
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	226
1997	51
1998	55
1999	133
2000	38
2001	12
2002	0
2003	10
2004	56
2005	0
2006	0
2007	0
2008	170