Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	0
1975	26
1976	0
1977	0
1978	0
1979	4503
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	2000
1990	0
1991	0
1992	0
1993	0
1994	0
1995	98000
1996	57330
1997	0
1998	0
1999	1
2000	0
2001	0
2002	0
2003	100
2004	3502
2005	0
2006	0
2007	1
2008	0