Year	Annual Number
1970	0
1971	0
1972	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	1073
1987	530
1988	0
1989	29
1990	60
1991	7689
1992	100
1993	0
1994	0
1995	0
1996	5539
1997	0
1998	39
1999	516
2000	99
2001	544
2002	255
2003	0
2004	172
2005	719
2006	0
2007	200
2008	178