Year	Total
1980	7951574400
1981	7777528000
1982	7658587200
1983	7537054800
1984	8030413600
1985	8047600000
1986	12666104000
1987	12666104000
1988	12666104000
1989	12666104000
1990	12664740000
1991	12666104000
1992	12666104000
1993	12666104000
1994	12862520000
1995	12780680000
1996	12630640000
1997	12630640000
1998	12780680000
1999	12698840000
2000	13575892000
2001	13514512000
2002	17826116000
2003	18175300000
2004	18105736000
2005	18753636000
2006	18877760000
2007	18853208000
2008	18771368000
2009	18688164000
2010	20619588000
2011	21084712000
2012	21455720000
2013	21523920000
2014	21523920000
2015	21605760000
2016	21605760000