Year	current US$
1976	469.042932562891
1977	530.7929062250777
1978	590.7513169213354
1979	649.011797908999
1980	618.0821262016065
1981	823.5890729064164
1982	762.9273241033243
1983	728.9867147548565
1984	822.3770877847531
1985	710.233679499091
1986	512.1223075822691
1987	554.1810670322936
1988	569.0647704265284
1989	567.8753013387471
1990	580.9495129788291
1991	642.2887245614378
1992	673.2793804437861
1993	672.0642706020235
1994	685.7395413310007
1995	755.7650101929638
1996	823.5189065740752
1997	868.3126670425133
1998	923.5601130504887
1999	863.9639889348911
2000	835.7543240773294
2001	807.2583243949636
2002	767.4648698111281
2003	754.939363961726
2004	781.3538556343791
2005	814.3920887235059
2006	941.627236939215
2007	1070.5102366226374
2008	1377.4771736431003
2009	1448.6596150968874
2010	1576.3966151653337
2011	1837.4706132314586
2012	1962.1297029575778
2013	2189.597599281248
2014	2371.1508079375562
2015	2515.201526724809
2016	2598.9875010777755
2017	2742.074657026131
2018	2882.4018620899974
2019	2914.4925099051097
2020	2626.220705349768
2021	2625.319924751943