Year	Total
1965	5606000
1966	6093000
1967	6623000
1968	7201000
1969	7919000
1970	8582000
1971	9388000
1972	10240000
1973	11303000
1974	11011000
1975	11684000
1976	11811000
1977	11697000
1978	12287000
1979	11650000
1980	11983000
1981	12979000
1982	13145000
1983	13269000
1984	14448000
1985	14116000
1986	13623000
1987	14401000
1988	15874000
1989	16449000
1990	16593000
1991	16722000
1992	17276000
1993	18003000
1994	18783000
1995	20034000
1996	20669000
1997	21001000
1998	21315000
1999	21616000
2000	21991000
2001	22466000
2002	23051000
2003	23883000
2004	24770000
2005	24828000
2006	25256000
2007	25768000
2008	24428000
2009	24137000
2010	25619000
2011	25738000
2012	26521000
2013	27263000
2014	27022000
2015	27868000
2016	26941000