Year	Total
1980	6441353600
1981	7774527200
1982	7774527200
1983	7787894400
1984	7694324000
1985	7582885200
1986	7485632000
1987	7380604000
1988	7230836800
1989	7090481200
1990	6997047200
1991	6946170000
1992	6987090000
1993	6925846400
1994	6789310000
1995	6655774400
1996	6611580800
1997	6522920800
1998	2951423200
1999	2935191600
2000	2753370400
2001	2559818800
2002	2345534400
2003	2187992400
2004	2019129200
2005	1864588000
2006	1752740000
2007	1662306800
2008	1618386000
2009	1618522400
2010	1594652400
2011	1554141600
2012	1558233600
2013	1511175600
2014	1475302400
2015	1087994600
2016	1087994600