Year	Total
1971	14200
1972	13930
1973	14790
1974	15660
1975	16660
1976	17210
1977	17880
1978	18110
1979	18170
1980	18360
1981	19110
1982	19560
1983	19860
1984	19450
1985	20090
1986	20770
1987	21320
1988	22320
1989	23210
1990	24710
1991	26810
1992	28770
1993	30570
1994	31800
1995	34530
1996	37720
1997	40550
1998	43940
1999	45590
2000	48110
2001	50060
2002	53160
2003	54380
2004	65230
2005	69710
2006	72540
2007	73600
2008	71400
2009	76640