Year	Total
1970	1566000
1971	2337000
1972	3355000
1973	4260000
1974	4860000
1975	5219000
1976	6161000
1977	7038000
1978	7577000
1979	8722000
1980	10015000
1981	10855000
1982	10587000
1983	11500000
1984	10955000
1985	11698000
1986	12765000
1987	13036000
1988	13337000
1989	15302000
1990	17690000
1991	18839000
1992	20572000
1993	21356000
1994	24334000
1995	25479000
1996	25672000
1997	25676000
1998	26229000
1999	26610000
2000	27028000
2001	28287000
2002	28605000
2003	29254000
2004	31150000
2005	33159000
2006	35298000
2007	37117000
2008	36374000
2009	41332000
2010	45358000
2011	47857000
2012	51198000
2013	53127000
2014	57268000
2015	65361000
2016	82039000