Year	current US$
1970	803071.389044807
1971	963783.465369962
1972	1350151.26703704
1973	1623139.5292191
1974	1904596.11323587
1975	2425376.2954223
1976	2460313.04674633
1977	3196654.01498471
1978	5032492.34789318
1979	5658542.38986243
1980	6703472.52839779
1981	8328276.46162022
1982	8649477.37919513
1983	8409116.60081036
1984	8711112.41782992
1985	10086842.1433067
1986	12920734.1439474
1987	15380776.2748146
1988	18898258.1442245
1989	19734238.9088724
1990	30439708.066902
1991	40817207.6328476
1992	34862802.2075004
1993	39125600.9531134
1994	42354958.5294288
1995	45113243.6774329
1996	48681433.8569749
1997	60453322.9153295
1998	67992618.8784089
1999	72374767.9236218
2000	70552241.3031053
2001	69292567.1766259
2002	79148901.6318129
2003	77537789.7314706
2004	92296795.1175296
2005	107125854.18421
2006	118968528.707885
2007	114388553.881988
2008	103679625.088116
2009	87606811.4175971
2010	101926663.753118
2011	121862462.920389
2012	116776738.384474
2013	141247640.456479
2014	151404656.623293
2015	153801108.891478
2016	165349186.718206
2017	173464122.107269
2018	173467684.526313
2019	172345467.531555
2020	136279718.464992
2021	154048380.527994