Year	Total
1965	4435000
1966	4839000
1967	5689000
1968	5815000
1969	6190000
1970	6707000
1971	7405000
1972	8586000
1973	10000000
1974	9390000
1975	9943000
1976	10574000
1977	10764000
1978	11702000
1979	12383000
1980	12400000
1981	11920000
1982	11901000
1983	11414000
1984	11689000
1985	11978000
1986	12159000
1987	13205000
1988	13661000
1989	14961000
1990	14679000
1991	14865000
1992	15189000
1993	15477000
1994	15987000
1995	16569000
1996	17364000
1997	17654000
1998	18642000
1999	18012000
2000	18883000
2001	19302000
2002	19378000
2003	20293000
2004	20116000
2005	20138000
2006	21256000
2007	21382000
2008	20358000
2009	19471000
2010	18085000
2011	17001000
2012	15267000
2013	14498000
2014	14382000
2015	14918000
2016	15377000