Year	Annual Number
1970	5109000
1971	51
1972	0
1973	5181
1974	0
1975	0
1976	47
1977	0
1978	0
1979	102100
1980	90
1981	150
1982	90
1983	0
1984	0
1985	0
1986	250000
1987	871
1988	130900
1989	16
1990	20640
1991	0
1992	0
1993	80350
1994	18010
1995	86070
1996	180200
1997	15000
1998	0
1999	151400
2000	79110
2001	6000
2002	124600
2003	74120
2004	531600
2005	602000
2006	221600
2007	1611000
2008	1250000