Year	current US$
1970	7631076.86970393
1971	8145912.70583279
1972	12634473.4790947
1973	16199824.2547472
1974	17571204.8279711
1975	26393610.6396727
1976	29155183.052016
1977	33517075.2216089
1978	43723768.3689876
1979	54804419.5665812
1980	68224288.7861339
1981	52232517.0407364
1982	41643347.1073616
1983	41467972.7187204
1984	42013660.6526548
1985	34295509.3397826
1986	45792104.7050964
1987	60767444.4755811
1988	79183561.0636971
1989	79890725.4801343
1990	94626426.8037246
1991	96435661.5077087
1992	90559256.676182
1993	91018975.8379283
1994	73519060.1344906
1995	61388683.4914989
1996	61591257.4394039
1997	85538599.1255223
1998	119673099.252035
1999	150667999.383495
2000	134051803.401799
2001	149649147.36111
2002	185865566.125308
2003	217089404.713313
2004	328168549.32931
2005	393802461.682842
2006	417758646.375426
2007	541976924.189366
2008	625316356.334422
2009	562218960.866652
2010	612253020.388054
2011	785401195.920833
2012	849509991.764038
2013	962661259.281317
2014	809446335.660546
2015	723386395.410231
2016	580248696.500191
2017	609518431.981907
2018	773079813.853374
2019	783078986.561592
2020	814447868.394049
2021	917742614.214551