Year	current US$
1970	9528308.52246292
1971	9196037.68676591
1972	17104712.1226627
1973	20641452.5783283
1974	16424573.788144
1975	21416679.7918313
1976	18480454.2111237
1977	15784406.6988163
1978	14396994.5912277
1979	14407257.3225067
1980	15619413.5228108
1981	16406372.7935457
1982	20176615.9227566
1983	22093985.3009772
1984	20560740.1829297
1985	19924566.5148839
1986	24272551.7517089
1987	21422848.8418471
1988	21021570.4779822
1989	20576739.4508884
1990	23373077.6309619
1991	23626387.2915854
1992	26152494.4238368
1993	34409772.0811916
1994	35198033.7197971
1995	43081117.1978514
1996	53466783.3094026
1997	52699947.1609714
1998	18209583.0946705
1999	22596541.0859621
2000	20230193.3457042
2001	46469565.8904486
2002	38715108.5361683
2003	42688695.7349608
2004	53504040.1743217
2005	58934297.0977394
2006	70358260.8293215
2007	97998459.2975827
2008	150417388.775298
2009	199461593.721935
2010	267211729.299542
2011	398471758.150623
2012	535100746.225623
2013	667840364.58365
2014	809974944.0142
2015	922501400.029154
2016	1000766594.84915
2017	1138724728.9269
2018	1158314883.80087
2019	1096058834.52219
2020	1261444880.25164
2021	1046096528.84741