Year	Annual Number
1970	11
1971	0
1972	0
1973	0
1974	0
1975	10
1976	0
1977	0
1978	0
1979	16
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	791
1996	25
1997	60
1998	0
1999	0
2000	6
2001	15
2002	80
2003	35
2004	0
2005	0
2006	17
2007	0
2008	39