Year	Total
1971	21070
1972	31380
1973	36720
1974	39900
1975	43080
1976	48500
1977	45570
1978	46860
1979	51160
1980	49180
1981	50640
1982	54260
1983	56150
1984	59760
1985	63370
1986	74980
1987	77300
1988	76700
1989	76960
1990	82370
1991	89250
1992	93640
1993	93810
1994	96390
1995	83580
1996	92350
1997	90630
1998	89680
1999	104000
2000	101700
2001	109000
2002	110700
2003	100000
2004	95180
2005	108400
2006	117800
2007	124800
2008	125800
2009	277600
2010	330400