Year	current US$
1970	107797999.374555
1971	112748556.927501
1972	97488703.135307
1973	105927660.483019
1974	132260142.371893
1975	155790640.096374
1976	168266640.203143
1977	194994299.369244
1978	218072060.140131
1979	244939574.034261
1980	261330375.35115
1981	249232122.946191
2002	346155362.11051
2003	414628368.304446
2004	494199535.024783
2005	534220721.194027
2006	586655830.493086
2007	808520477.376337
2008	875519867.785475
2009	1007275126.47066
2010	1315124428.19327
2011	1469911062.42629
2012	1646490068.66479
2013	1677066930.31799
2014	1597595017.26609
2015	1547802525.15607
2016	1307011845.74819
2017	1325949720.59984
2018	1392398550.36158
2019	1401991493.82822
2020	1697020690.56449
2021	1239762312.72959