Year	Total
1985	18900000000
1986	20355000000
1987	20135000000
1988	22489000000
1989	25808000000
1990	28500000000
1991	29871000000
1992	30087000000
1993	31205000000
1994	31381000000
1995	33264000000
1996	34520000000
1997	34207000000
1998	38984000000
1999	43287000000
2000	43763999999.99999
2001	46508999999.99999
2002	46107000000
2003	46852000000
2004	45105000000
2005	46575000000
2006	49041000000.00001
2007	47253000000
2008	45968999999.99999
2009	50207000000
2010	54093000000
2011	52465000000
2012	46613000000
2013	51672000000
2014	52802000000
2015	52421000000.00001
2016	60494000000