Year	current US$
1971	190.7230694810504
1972	200.7851058188347
1973	249.7670031810735
1974	342.66526111557454
1975	362.6047359949501
1976	404.67504841519036
1977	456.432091076854
1978	515.4415252866902
1979	597.3878908361735
1980	690.1229699475084
1981	741.5359233732158
1982	744.6704960904854
1983	644.861757104971
1984	574.910502679036
1985	546.9784311914528
1986	519.7797739352465
1987	571.9611324268698
1988	646.6026397923252
1989	713.9639664069923
1990	741.8617662062712
1991	751.9703318787538
1992	868.5081935575041
1993	868.5364218378764
1994	1011.2996745172907
1995	1143.790953778048
1996	1262.6950584396632
1997	1245.4977295144997
1998	1049.3753866557042
1999	1176.8234549328015
2000	1084.9544213620006
2001	999.617126989787
2002	1043.846070055564
2003	1052.680095504017
2004	1095.703065752773
2005	1217.4379051750002
2006	1406.3384861471206
2007	1660.3093825132457
2008	1936.1433809746723
2009	1893.1978657709924
2010	2178.181664368348
2011	2395.083909618532
2012	2678.3840885143413
2013	2881.9622265767975
2014	2956.235255448642
2015	3023.260747072195
2016	3088.391866490827
2017	3126.351967809497
2018	3227.1861879887433
2019	3404.1737727702543
2020	3127.1519684829914
2021	3174.416022803271