Year	current US$
1970	2162874.25149701
1971	2382036.29695122
1972	2640260.253125
1973	3104867.79447853
1974	3864615.78362573
1975	4425226.96546963
1976	3702436.61300448
1977	4686592.65525
1978	5416454.6975
1979	6127495.0825
1980	8197384.77247605
1981	8122166.41276384
1982	7415997.58837355
1983	7804847.12845116
1984	8644659.56492536
1985	9326212.16259
1986	8931795.69740237
1987	11685240.8361391
1988	13338735.1201263
1989	15273956.2798858
1990	24562924.4022
1991	25942400
1992	28499100
1993	32227800
1994	38785936.8
1995	42980149.8
1996	40429716.25
1997	40543610.4
1998	45547626.5144818
1999	48075232.2868935
2000	54430766.08
2001	54907120.05
2002	58916977.8675001
2003	61634629.65
2004	64910548.35
2005	71779786.9642852
2006	80896298.2928572
2007	88929159.4285721
2008	94052768.2499999
2009	99252388.9142862
2010	103542905.678571
2011	115394100
2012	116684260
2013	122068170
2014	127812780
2015	135151695
2016	137196495
2017	138075120
2018	137944125
2019	143969895
2020	129164265
2021	154225845