Year	Total
1971	3714000
1972	4358000
1973	4978000
1974	5647000
1975	6216000
1976	7129000
1977	8038000
1978	8835000
1979	10020000
1980	11080000
1981	11240000
1982	12140000
1983	13020000
1984	14320000
1985	15340000
1986	15690000
1987	15960000
1988	17120000
1989	17600000
1990	17770000
1991	18730000
1992	19200000
1993	20210000
1994	20870000
1995	21830000
1996	22850000
1997	23990000
1998	25060000
1999	25190000
2000	26170000
2001	23030000
2002	24600000
2003	26280000
2004	27580000
2005	29020000
2006	29990000
2007	32160000
2008	31780000
2009	33620000
2010	34680000