Year	current US$
1960	186.02429119145728
1961	198.9347002910856
1962	226.8778341026971
1963	237.93639939568462
1964	257.4541492174329
1965	274.2013572838468
1966	242.20260374866405
1967	276.1043695943304
1968	296.60593647509904
1969	367.35032833677974
1970	338.7112795809045
1971	396.0909906176227
1972	452.04428969413107
1973	462.5781633398977
1974	712.1639040815061
1975	910.6130182271978
1976	983.8703955792889
1977	958.4894021245724
1978	1116.120094650829
1979	1154.5138636605068
1980	1467.8602160334187
1981	1686.0948585888796
1982	1713.736846234298
1983	1788.3530878563677
1984	1718.8294762559915
1985	1556.1764203269838
1986	1218.7082417407294
1987	1006.6578794583858
1988	907.295307032246
1989	818.7897996694124
1990	991.9113749376983
1991	1015.6116371822317
1992	1007.384987887707
1993	1011.7382961446856
1994	727.0194573925925
1995	796.223592972089
1996	937.4991036532093
1997	960.3573427214241
1998	980.6654602043046
1999	998.2815743912834
2000	1161.2370818903382
2001	1209.7732922593927
2002	1204.225831603392
2003	1239.435775759653
2004	1387.2451218941412
2005	1552.9301261992728
2006	1736.9171070425598
2007	1954.5625565978694
2008	2447.5071616813057
2009	2479.0942337843026
2010	2748.322693834752
2011	2971.282433830698
2012	1910.6045258083336
2013	993.7398831145068
2014	1071.2342036606667
2015	857.4178847606876
2016	664.294847192603
2017	862.325327610986
2018	1111.946829222929
2019	1123.6323525146538
2020	537.048370894551
2021	421.11734518175604