Year	Total
1965	9700000
1966	8974000
1967	9120000
1968	9232000
1969	9290000
1970	9814000
1971	9863000
1972	10101000
1973	9893000
1974	9582000
1975	10619000
1976	10285000
1977	11017000
1978	9468000
1979	10791000
1980	12439000
1981	15345000
1982	17005000
1983	17886000
1984	18184000
1985	17978000
1986	18630000
1987	18074000
1988	15682000
1989	19332000
1990	19212000
1991	19999000
1992	20404000
1993	18354000
1994	18922000
1995	18967000
1996	16027000
1997	18355000
1998	17491000
1999	19603000
2000	20936000
2001	19168000
2002	21598000
2003	20129000
2004	21049000
2005	20513000
2006	17908000
2007	20037000
2008	13504000
2009	9430000
2010	6897000
2011	12791000
2012	15492000
2013	11397000
2014	11639000
2015	13686000
2016	10442000