Year	Total
1971	292780
1972	1614700
1973	1561500
1974	1707900
1975	9222600
1976	13652000
1977	14005000
1978	17372000
1979	19500000
1980	25050000
1981	24292000
1982	25232000
1983	31398000
1984	35955000
1985	39211000
1986	43034000
1987	50115000
1988	56980000
1989	74909000
1990	82143000
1991	93842000
1992	106900000
1993	114130000
1994	128580000
1995	138400000
1996	154660000
1997	156230000
1998	149600000
1999	149670000
2000	160730000
2001	162490000
2002	157920000
2003	153850000
2004	150270000
2005	138730000
2006	129050000
2007	118600000
2008	114750000
2009	108690000
2010	98849000
2011	93777000
2012	87266000
2013	83192000
2014	85323000
2015	88022000
2016	90421000