Year	Total
1985	12274000000
1986	12981000000
1987	12722000000
1988	13966000000
1989	15324000000
1990	16104000000
1991	17345000000
1992	18286000000
1993	19414000000
1994	19883000000
1995	19715000000
1996	20654000000
1997	21497000000
1998	23262000000
1999	24757000000
2000	25412000000
2001	26625000000
2002	27648000000
2003	29528000000
2004	31249000000
2005	33915000000
2006	35227000000
2007	37310000000
2008	40236999999.99999
2009	43111999999.99999
2010	45735000000
2011	53074000000
2012	57397000000
2013	59890000000
2014	64241000000
2015	68798000000
2016	70248000000