Year	Total
1970	750000
1971	1324000
1972	1344000
1973	1562000
1974	1564000
1975	1494000
1976	1746000
1977	3510000
1978	5139000
1979	5499000
1980	6768000
1981	7974000
1982	8550000
1983	7524000
1984	9900000
1985	11907000
1986	13698000
1987	15201000
1988	15624000
1989	18342000
1990	18099000
1991	21429000
1992	19953000
1993	20691000
1994	24174000
1995	28188000
1996	30420000
1997	32679000
1998	33363000
1999	34641000
2000	34542000
2001	40446000
2002	39051000
2003	40311000
2004	41661000
2005	43011000
2006	43911000
2007	45261000
2008	45216000
2009	43956000
2010	46154000
2011	47077000
2012	48870000
2013	49140000
2014	48820000
2015	54163000
2016	55676000