Year	Total
1970	10123000
1971	10020000
1972	10439000
1973	11350000
1974	11903000
1975	12089000
1976	11878000
1977	12586000
1978	15757000
1979	19141000
1980	23137000
1981	24907000
1982	26619000
1983	26803000
1984	26369000
1985	25619000
1986	22779000
1987	23151000
1988	23458000
1989	22515000
1990	24408000
1991	24749000
1992	23963000
1993	25659000
1994	27336000
1995	26993000
1996	29429000
1997	31106000
1998	33688000
1999	33823000
2000	34488000
2001	34612000
2002	35762000
2003	37459000
2004	39029000
2005	47006000
2006	51572000
2007	48195000
2008	48042000
2009	53346000
2010	51806000
2011	52426000
2012	51473000
2013	52369000
2014	51358000
2015	48653000
2016	42461000