Year	Total
1980	267300000
1981	306000000
1982	300600000
1983	285300000
1984	279900000
1985	285300000
1986	278100000
1987	272700000
1988	264600000
1989	257400000
1990	226800000
1991	214200000
1992	209700000
1993	207000000
1994	257400000
1995	314100000
1996	410400000
1997	465300000
1998	504000000
1999	544500000
2000	501300000
2001	518400000
2002	530100000
2003	478800000
2004	478800000
2005	477000000
2006	432000000
2007	433170000
2008	391707000
2009	367398000
2010	343026000
2011	337860000
2012	334008000
2013	311940000
2014	293157000
2015	293157000
2016	270144000