Year	Total
1985	9876300000
1986	10576000000
1987	11814000000
1988	13018000000
1989	14039000000
1990	15618000000
1991	16597000000
1992	17543000000
1993	18962000000
1994	20675000000
1995	22057000000
1996	23909000000
1997	26709000000
1998	28375000000
1999	29520000000
2000	31665000000
2001	33061000000
2002	34665000000
2003	35282000000
2004	36810000000
2005	38213000000
2006	39442000000
2007	41138000000.00001
2008	41717000000
2009	41801000000
2010	45367000000
2011	45998999999.99999
2012	46936000000.00001
2013	47964000000
2014	49310000000
2015	50272000000
2016	51555000000