Year	Total
1991	28174500000
1992	28854900000
1993	28858500000
1994	28671300000
1995	28003500000
1996	27771300000
1997	27889200000
1998	27720000000
1999	27376200000
2000	27547200000
2001	27718200000
2002	28174500000
2003	28060200000
2004	27945900000
2005	28060200000
2006	28060200000
2007	28174500000
2008	28231200000
2009	28287900000
2010	28345500000
2011	28629900000
2012	28780200000
2013	29033100000
2014	29120400000
2015	29043900000
2016	29043900000