Year	Total
1965	17371000
1966	18004000
1967	18508000
1968	19062000
1969	19714000
1970	19922000
1971	19997000
1972	20888000
1973	21753000
1974	22706000
1975	23434000
1976	24230000
1977	25295000
1978	25955000
1979	27132000
1980	27925000
1981	28645000
1982	28949000
1983	28939000
1984	30602000
1985	31654000
1986	32458000
1987	33823000
1988	35577000
1989	37314000
1990	38207000
1991	38974000
1992	39205000
1993	39457000
1994	40263000
1995	41631000
1996	43333000
1997	45525000
1998	47557000
1999	47809000
2000	48004000
2001	47452000
2002	48494000
2003	49888000
2004	52032000
2005	51742000
2006	53115000
2007	52661000
2008	54853000
2009	53121000
2010	49390000
2011	48112000
2012	45093000
2013	43000000
2014	42643000
2015	44087000
2016	43807000