Year	current US$
1980	2737546.02361453
1981	3601275.83589994
1982	5450034.23318817
1983	3650803.21603328
1984	4413142.59009828
1985	4361063.76647679
1986	4695733.00209165
1987	5108644.43662307
1988	5255597.83202887
1989	6264162.96263411
1990	6997206.51271113
1991	7396596.64809333
1992	7964532.88112503
1993	8109903.26123362
1994	8242615.69821665
1995	8367997.70682933
1996	8736677.67963891
1997	9319072.76753926
1998	9636001.16191215
1999	9991661.57982824
2000	10216697.2148993
2001	10681929.2128472
2002	11284132.2805342
2003	11765739.6444963
2004	12353415.6580346
2005	13763154.2414731
2006	14761757.583066
2007	15501813.7088643
2008	16198867.6785535
2009	16623960.6410547
2010	17202280.2930234
2011	10601833.8163257
2012	11073411.1280732
2013	11489336.3223155
2014	11967518.3556266
2015	12359221.672283
2016	12763960.8551128
2017	13299069.7453002
2018	13925209.8856745
2019	14493956.3887727
2020	14262793.4268797
2021	17645067.4421533