Year	Total
1971	2580000
1972	2923000
1973	3267000
1974	3697000
1975	3869000
1976	3921000
1977	4093000
1978	3835000
1979	4308000
1980	5005000
1981	5636000
1982	6397000
1983	7426000
1984	7462000
1985	7942000
1986	8128000
1987	8599000
1988	9385000
1989	10180000
1990	10900000
1991	10760000
1992	11390000
1993	13050000
1994	14390000
1995	16390000
1996	16160000
1997	16850000
1998	17880000
1999	17520000
2000	19120000
2001	23850000
2002	24760000
2003	24390000
2004	30400000
2005	34140000
2006	37470000
2007	41730000
2008	50320000
2009	52940000
2010	62100000