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	15040
1986	0
1987	69
1988	5546
1989	0
1990	0
1991	0
1992	0
1993	0
1994	26
1995	0
1996	51500
1997	18000
1998	0
1999	573500
2000	27020
2001	0
2002	55380
2003	651
2004	4035
2005	45890
2006	135
2007	0
2008	1508