Year	Total
1965	2120800
1966	2323900
1967	2784900
1968	3040900
1969	3604900
1970	3894000
1971	4097000
1972	4679000
1973	4855000
1974	4969000
1975	4670000
1976	5518000
1977	5968000
1978	6200000
1979	6338000
1980	6486000
1981	6879000
1982	6694000
1983	5941000
1984	5491000
1985	5157000
1986	5021000
1987	4910000
1988	5628000
1989	6002000
1990	6283000
1991	6270000
1992	8065000
1993	8388000
1994	8931000
1995	9568000
1996	9375000
1997	9281000
1998	8902000
1999	9481000
2000	9889000
2001	11952000
2002	13075000
2003	13123000
2004	15568000
2005	14027000
2006	15215000
2007	16382000
2008	14848000
2009	16876000
2010	17802000
2011	17976000
2012	17209000
2013	17606000
2014	16649000
2015	18262000
2016	18892000