Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	33
1975	0
1976	0
1977	0
1978	0
1979	0
1980	60080
1981	10
1982	0
1983	0
1984	200
1985	0
1986	0
1987	0
1988	1513
1989	0
1990	4569
1991	542
1992	0
1993	0
1994	0
1995	306900
1996	0
1997	0
1998	1241000
1999	0
2000	1002
2001	2532
2002	3034
2003	8
2004	50120
2005	3007
2006	63070
2007	3202
2008	0