Year	Total
1971	0
1972	258
1973	19950
1974	41790
1975	16080
1976	38010
1977	9802
1978	1634
1979	184600
1980	388900
1981	441400
1982	502100
1983	528800
1984	622400
1985	806700
1986	1007000
1987	989900
1988	986600
1989	1045000
1990	1035000
1991	1005000
1992	950100
1993	987600
1994	1083000
1995	983400
1996	967200
1997	952100
1998	979700
1999	1128000
2000	1418000
2001	1471000
2002	1544000
2003	1536000
2004	1464000
2005	1524000
2006	1549000
2007	1318000
2008	1436000
2009	1211000
2010	1253000
2011	1237000