Year	Annual Number
1970	3298000
1971	0
1972	1575000
1973	0
1974	43750
1975	0
1976	0
1977	0
1978	0
1979	1113
1980	3007
1981	12290
1982	3
1983	10
1984	0
1985	400
1986	8196
1987	0
1988	0
1989	0
1990	101000
1991	47350
1992	0
1993	151
1994	0
1995	0
1996	75980
1997	0
1998	0
1999	8131
2000	0
2001	354200
2002	0
2003	0
2004	0
2005	2510
2006	0
2007	480500
2008	0