Year	Total
1971	7137
1972	7137
1973	8770
1974	9114
1975	8426
1976	11870
1977	29320
1978	61820
1979	69050
1980	82890
1981	114700
1982	92350
1983	74460
1984	128300
1985	165900
1986	180200
1987	174700
1988	189100
1989	187500
1990	190300
1991	175100
1992	162600
1993	197300
1994	205600
1995	207900
1996	258200
1997	249600
1998	184000
1999	268700
2000	293900
2001	214900
2002	292400
2003	242700
2004	324900
2005	320200
2006	307800
2007	315200
2008	341600
2009	335300
2010	360600