Year	US Dollars adjusted for inflation)
1980	2256863838.22703
1981	2369707096.70251
1982	2206197320.31434
1983	1859824296.04982
1984	1738935719.04124
1985	1756325019.20837
1986	1715929613.55749
1987	1968171274.00593
1988	2129561223.59834
1989	2267982800.06229
1990	2290662465.51964
1991	2402904906.60493
1992	2277201007.17869
1993	2476846449.1061
1994	2629392015.76334
1995	2688219667.4643
1996	3409880890.89143
1997	3779581255.9847
1998	4227816687.96006
1999	4558557689.36852
2000	4635073216.24829
2001	5224699295.73394
2002	5684162360.24927
2003	6053667397.64344
2004	6526530624.44069
2005	7095687684.10245
2006	7794687813.46585
2007	8373526084.51733
2008	8949306941.23667
2009	9517764259.6947
2010	10154238250.1818
2011	10876976985.2962
2012	11659922000.9265
2013	12492636703.2019
2014	13422597260.7863
2015	14307681432.4423
2016	14846071334.9796
2017	15396964121.6007