Year	Annual Number
1970	84530
1971	89600
1972	0
1973	0
1974	0
1975	55760
1976	219900
1977	30
1978	0
1979	0
1980	0
1981	0
1982	0
1983	835500
1984	750100
1985	744
1986	21120
1987	0
1988	0
1989	0
1990	0
1991	0
1992	349500
1993	0
1994	0
1995	160300
1996	26010
1997	0
1998	1591000
1999	1603000
2000	24080
2001	611
2002	252400
2003	291100
2004	36940
2005	3046
2006	0
2007	0
2008	0