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	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	325000
1994	0
1995	1700000
1996	10000
1997	0
1998	24590
1999	0
2000	0
2001	300000
2002	0
2003	600
2004	0
2005	8340
2006	5002
2007	0
2008	224800