Year	current US$
1980	307.8536431102284
1981	303.4266118733044
1982	288.05696487140415
1983	280.4620702292838
1984	281.97038024157786
1985	295.29120115587597
1986	313.44702997713557
1987	333.16683390947117
1988	340.8049680127684
1989	329.29369680421814
1990	348.11506243112984
1991	348.1491326721514
1992	334.0920921522661
1993	323.9584622655601
1994	294.660080387872
1995	326.40946835178835
1996	360.77099029767714
1997	369.1455382791325
1998	375.2537018006377
1999	382.5615053171471
2000	404.2869456990893
2001	396.0651923206695
2002	403.0081035148592
2003	428.07313135078806
2004	482.43574319716987
2005	535.6267469699154
2006	601.1937977766839
2007	690.7221573912129
2008	817.661751003207
2009	851.8090377543151
2010	932.291434246833
2011	811.7189258323648
2012	825.0604058751773
2013	879.8866548894258
2014	936.3298091822675
2015	935.1625593884604
2016	994.8744595365706
2017	1064.4842725708595
2018	1046.4485591498299
2019	1098.206333436144
2020	1092.1554005460448
2021	1135.4204480681606