Year	current US$
1971	3193259.478
1972	4193128.586
1973	4609586.239
1974	3372404.337
1975	271283784.34999996
1976	340581684.27129996
1977	398830659.7152
1978	579211280.8074
1979	512835842.71099997
1980	535977945.56310004
1981	513738331.6584
1982	532680667.52399987
1983	509391594.4479
1984	542512878.8454
1985	936618846.1606002
1986	960031017.4012998
1987	882801617.5404998
1988	905825275.0139999
1989	952278343.4870999
1990	712544777.5922468
1991	731231560.4548727
1992	752072943.9600042
1993	832692215.6920985
1994	840289042.5137693
1995	1009075679.8576509
1996	950308219.969811
1997	1056665421.2730527
1998	1116333335.7461007
1999	1241644573.0281258
2000	1411141887.8792171
2001	1729805102.511267
2002	1438562882.1615257
2003	1868475819.6936598
2004	2462036913.038036
2005	2560310830.575754
2006	2891048465.069189
2007	3331480971.8017883
2008	5363889801.403029
2009	5415196058.799887
2010	5292502431.033757
2011	15870125824.954575
2012	15783407457.69538
2013	16508195186.244257
2014	17528927136.37862
2015	17447395923.213936
2016	17392296294.938793
2017	18927468189.676994
2018	19073907060.26753
2019	19338987838.570473
2020	17380481627.674847
2021	18662255143.638603
2022	19424999108.150654