Year	current US$
1970	27481504.6389673
1971	33360843.5823358
1972	43819191.6414627
1973	59641254.3986751
1974	67408155.7490803
1975	98317216.1895361
1976	104808489.028213
1977	128105804.164322
1978	196359103.368772
1979	239164281.783159
1980	270835749.758587
1981	236302493.481095
1982	240447843.898994
1983	144433439.053254
1984	143375339.553829
1985	148986794.571876
1986	233952085.96713
1987	311298770.394382
1988	345646084.476138
1989	335060915.233415
1990	447471746.843746
1991	488024437.550068
1992	544564086.107313
1993	548285673.45187
1994	587113932.118088
1995	731180837.438424
1996	711339908.794788
1997	703967898.274134
1998	703307408.2372
1999	762779381.288748
2000	718985121.508093
2001	739121259.737236
2002	783868442.342721
2003	955558054.470642
2004	1274285845.77755
2005	1398577207.0764
2006	1417521728.02479
2007	1830906687.48873
2008	1945358672.56748
2009	1484174466.27684
2010	1651058120.92641
2011	1869351049.67823
2012	2029454248.25024
2013	2235286063.60834
2014	2339898347.70269
2015	2040568530.79059
2016	2002983077.99927
2017	2087526849.97657
2018	2347103795.14689
2019	2305620176.04429
2020	2506152635.51242
2021	2927472437.72107