Year	current US$
1970	2456.04255319149
1971	2258.04255319149
1972	3255.4518127884
1973	4993.57073170732
1974	6730.7625
1975	10119.3616071429
1976	9841.8375
1977	19078.2428571429
1978	29267.7
1979	28003.8
1980	37633.8875
1981	43004.3625
1982	118327.733333333
1983	90508
1984	99330.6285714286
1985	39062.76
1986	128485.866666667
1987	135153.542857143
1988	144660.685714286
1989	147081.838095238
1990	147360.714285714
1991	153128.380952381
1992	134804.497767619
1993	99540.3140198464
1994	105549.865067466
1995	159932.413793103
1996	165548.937931034
1997	170095.048275862
1998	261518.4
1999	113618.781763595
2000	112523.080619803
2001	126665
2002	142239.233653846
2003	204413.710134423
2004	200485.554996671
2005	199908.286403544
2006	246172.230751178
2007	228944.515094221
2008	404756.991309471
2009	396972.953525503
2010	478407.081966308
2011	552475.468313375
2012	637557.65292305
2013	531647.85003493
2014	856703.136401257
2015	781474.366250858
2016	607576.533481877
2017	752231.171418365
2018	383327.371320522
2019	516966.429087144
2020	473459.755056198
2021	441285.316904182