Year	US Dollars adjusted for inflation)
1980	164823625.34529
1981	174332993.38017
1982	178171240.96206
1983	187087619.73134
1984	188979789.62545
1985	213367969.50136
1986	208395308.72452
1987	217641261.24779
1988	223420207.34976
1989	220673975.13588
1990	216793281.8663
1991	214577136.65508
1992	289132649.49509
1993	321033270.67493
1994	374545778.59832
1995	440039841.24258
1996	733018355.31577
1997	1832347705.69357
1998	2267978887.20713
1999	2850033339.01954
2000	3369132140.08877
2001	5504483893.3827
2002	6575812458.086
2003	7493483546.94777
2004	10340911891.9249
2005	12072880264.5669
2006	13003085741.6938
2007	14990232117.7878
2008	17658359891.77999
2009	17895574579.7547
2010	16298542027.9965
2011	17361846462.6899
2012	18805114508.9646
2013	18027862926.5874
2014	18102689705.5274
2015	16457325595.0027
2016	15045964750.1647
2017	14561450359.0116