Year	Annual Number
1970	1816000
1971	46760
1972	493100
1973	3445000
1974	103900
1975	5263
1976	2705000
1977	158300
1978	1860000
1979	585600
1980	1867000
1981	1103000
1982	1020000
1983	170700
1984	4538000
1985	1604000
1986	1243000
1987	3239000
1988	4518000
1989	2137000
1990	6320000
1991	1578000
1992	1046000
1993	3582000
1994	1991000
1995	3278000
1996	37670
1997	366800
1998	7324000
1999	1387000
2000	6188000
2001	3451000
2002	3261000
2003	466400
2004	3243000
2005	20040
2006	7824000
2007	1922000
2008	6853000