Year	current US$
1980	1246.4234088487583
1981	1383.994969868605
1982	1271.3119407754014
1983	1349.658749025545
1984	1708.808631315116
1985	1892.31980692504
1986	2242.89044555599
1987	2444.3749382334113
1988	2742.3254963733234
1989	3081.556896366297
1990	3466.204351549659
1991	3619.5166781438784
1992	3971.323613858735
1993	3941.5541761022514
1994	4060.5902342066006
1995	4283.094774705306
1996	4441.603194270171
1997	4451.859771458001
1998	4774.9560981797
1999	4969.795294405489
2000	5264.716656726796
2001	4896.250149689322
2002	4945.622929936711
2003	5352.184404398149
2004	5670.255500177485
2005	5964.702272602838
2006	6520.306727232113
2007	6844.511811586457
2008	7264.7609166528455
2009	7093.868221749092
2010	7133.676838800246
2011	7754.175177796276
2012	7569.6786283249
2013	7376.731536098875
2014	7812.258108139058
2015	7542.150543374444
2016	8047.452418676742
2017	8474.664102092027
2018	9099.18148512446
2019	9104.711831331313
2020	6953.412674401658
2021	7607.054910856717