Year	US Dollars adjusted for inflation)
1980	20838796164.2892
1981	19921888878.9602
1982	19921888878.9602
1983	20758608496.4292
1984	22004125455.5086
1985	22774269734.128
1986	23434723953.2938
1987	24391504825.9617
1988	25886433442.242
1989	25897207754.25999
1990	25003728530.4399
1991	25251605316.555
1992	23777345709.6714
1993	18074725634.6424
1994	18316811901.127
1995	21064333691.2228
1996	23917364932.26279
1997	25657180391.1393
1998	26860796296.8363
1999	27446761809.8841
2000	28285157247.5007
2001	29474830552.3105
2002	33502768495.24179
2003	35028498785.4786
2004	38614841378.0661
2005	46688056705.4167
2006	55553668228.26129
2007	68436340152.84329
2008	77892256138.32561
2009	79771725943.31859
2010	82526143645.0623
2011	85722654097.5388
2012	90161025044.27928
2013	96330488415.3587
2014	100861846285.433
2015	103887446990.918
2016	103042328743.66501
2017	103785984479.99501