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	0
1987	0
1988	0
1989	0
1990	0
1991	226
1992	0
1993	0
1994	6501000
1995	0
1996	0
1997	34270
1998	1052
1999	331400
2000	771
2001	783
2002	0
2003	0
2004	149
2005	1698
2006	771
2007	0
2008	43