Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	3
1978	4
1979	0
1980	0
1981	0
1982	0
1983	0
1984	109
1985	0
1986	0
1987	0
1988	100
1989	0
1990	0
1991	0
1992	0
1993	0
1994	240
1995	0
1996	11
1997	0
1998	0
1999	0
2000	32
2001	0
2002	3
2003	11
2004	0
2005	0
2006	0
2007	10
2008	9