Year	current US$
1970	1693467.09753027
1971	1465320.37709053
1972	1674195.56297279
1973	2983753.2651637
1974	3283819.58575045
1975	4606846.98773333
1976	4096231.3728547
1977	7963904.17430687
1978	8218056.77018693
1979	7480232.07700586
1980	9474808.97665035
1981	8672053.59334825
1982	12977186.9118582
1983	8345067.47498137
1984	7794524.35517832
1985	5527537.34009543
1986	9194395.76766697
1987	8875709.70881277
1988	10045350.8635104
1989	10254335.2089564
1990	12497463.5057179
1991	12724737.2548056
1992	12967320.2172656
1993	10380062.9762186
1994	12842964.7826087
1995	20149754.5991768
1996	20629412.5396678
1997	19715142.8831098
1998	20521976.331877
1999	11792072.7084925
2000	13976846.7539524
2001	13606862.6298781
2002	16097752.1407429
2003	28595144.0383486
2004	31227935.918099
2005	31014138.1536593
2006	29584218.9973385
2007	47923215.4133853
2008	62764704.2875114
2009	66878083.3247218
2010	55802396.0675478
2011	60906128.1889284
2012	72374464.6701323
2013	73427890.9656962
2014	86292285.5493763
2015	98829332.1690311
2016	103859903.543831
2017	100664822.013863
2018	67074535.1541079
2019	78062601.6345327
2020	94570780.873139
2021	106199105.639931