Year	current US$
1970	12750318.6638949
1971	12300148.2012639
1972	13702840.4863153
1973	16918023.2076862
1974	19030615.8059584
1975	21986890.3632876
1976	16826142.212717
1977	24716164.5878762
1978	30476434.8066932
1979	25745799.2810437
1980	25521295.9017431
1981	25903131.4956937
1982	30311498.1888184
1983	22965071.6970687
1984	25213276.7157131
1985	14677943.3493835
1986	11264871.3646533
1987	12065381.8556315
1988	18963595.1959156
1989	13268616.1286008
1990	6378246.37958008
1991	17131125.694313
1992	14410433.1204191
1993	17255446.3462872
1994	19009140.1723962
1995	19485339.8845963
1996	21646020.4224622
1997	19829115.9543302
1998	6441249.43216085
1999	19641527.8510156
2000	31297823.7244491
2001	37534464.7800015
2002	41837064.1572177
2003	43618124.3173686
2004	42351456.4477105
2005	46601087.2062639
2006	48781100.6153205
2007	54117378.5294638
2008	59143113.2667802
2009	68223216.1280228
2010	65161632.6733637
2011	73985801.2712725
2012	108168038.337405
2013	126250698.638479
2014	132857693.017998
2015	139013518.381005
2016	129982524.003903
2017	166709839.706768
2018	198264098.660939
2019	235314053.58662
2020	257947879.288081
2021	283665667.116846