Year	Annual Number
1970	0
1971	500500
1972	0
1973	0
1974	0
1975	75000
1976	0
1977	440300
1978	200000
1979	0
1980	0
1981	500000
1982	0
1983	0
1984	0
1985	500000
1986	0
1987	0
1988	0
1989	2
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	400000
1998	0
1999	70020
2000	4501000
2001	749400
2002	500
2003	515000
2004	0
2005	47850
2006	0
2007	402100
2008	0