Year	Annual Number
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	113400
1981	3189000
1982	816600
1983	100
1984	28030
1985	19220
1986	9800000
1987	940700
1988	25650000
1989	100000000
1990	42310000
1991	210200000
1992	685000
1993	8631
1994	111500000
1995	126600000
1996	154700000
1997	7690000
1998	242700000
1999	107200000
2000	763300
2001	2346000
2002	113300000
2003	155900000
2004	42720000
2005	34750000
2006	14990000
2007	111100000
2008	7190000