Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	126
1984	0
1985	0
1986	0
1987	0
1988	26
1989	0
1990	25
1991	58
1992	0
1993	0
1994	0
1995	185
1996	0
1997	0
1998	14
1999	28
2000	135
2001	56
2002	50
2003	0
2004	0
2005	0
2006	18
2007	0
2008	25