Year	current US$
1970	13998.1254772253
1971	11888.028223134
1972	13211.7179408253
1973	23055.7059362772
1974	25167.1716132287
1975	35262.8571428571
1976	29131.2
1977	50612.7512195122
1978	50554.0577861163
1979	54487.7189493433
1980	63609.6104651163
1981	58826.88
1982	130988.533333333
1983	44170.2315448559
1984	26346.0765957447
1985	16583.9142857143
1986	16267.1142857143
1987	16252.9714285714
1988	15922.0285714286
1989	15786.2571428571
1990	56256.6857142857
1991	67596.8842105263
1992	99650.9102331903
1993	246190.245813594
1994	217723.116114866
1995	287215.71677795
1996	261401.438098446
1997	224192.690171087
1998	196235.731201495
1999	169012.88204709
2000	144826.272814715
2001	152385.020662667
2002	167537.238198175
2003	184479.61543842
2004	173640.646475688
2005	213344.47233379
2006	307181.251611333
2007	374994.648928996
2008	435559.726661335
2009	438103.6557312
2010	630811.086090632
2011	602167.613781852
2012	590263.762695868
2013	670144.099751618
2014	653347.943727904
2015	662321.850007687
2016	697589.756790289
2017	708332.660691009
2018	695122.429651004
2019	587744.748244242
2020	654212.213858536
2021	572854.490242043