Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	30
1975	0
1976	0
1977	0
1978	49
1979	27
1980	2
1981	0
1982	0
1983	103
1984	20
1985	0
1986	0
1987	2
1988	0
1989	0
1990	0
1991	0
1992	0
1993	241
1994	7
1995	5297
1996	0
1997	0
1998	0
1999	0
2000	1
2001	2
2002	0
2003	2
2004	40
2005	1
2006	0
2007	10
2008	14