Year	current US$
1980	221.87899024627336
1981	386.7704197634751
1982	352.4342883750054
1983	266.39840062514133
1984	230.50569583881568
1985	223.4583796942096
1986	210.41159506323442
1987	215.71180853186803
1988	221.15899530560287
1989	199.9393031649652
1990	327.37231684861496
1991	322.6304756710192
1992	288.2858230509906
1993	235.08025246850153
1994	205.68234184150532
1995	263.507255048046
1996	287.0404310473535
1997	311.00335977237233
1998	323.17475926147887
1999	353.5918565140732
2000	374.79692759462444
2001	347.8608310004369
2002	395.7642538470943
2003	411.6723863561916
2004	492.2816260410315
2005	573.5890513954521
2006	739.2054713506968
2007	851.1731430103844
2008	1029.9331890371557
2009	969.3442611997152
2010	1059.1953645047092
2011	1177.4100285078794
2012	1285.4410380516317
2013	1394.5698129022653
2014	1491.8917658071227
2015	1281.9171198649892
2016	1156.643137684641
2017	1173.1242868422923
2018	1160.120163422751
2019	1185.8569671993375
2020	1100.2452175016222
2021	1123.1690164428833