Year	current US$
1982	3396401.55719374
1983	3155975.98605642
1984	2826300.59603716
1985	2446483.23163943
1986	2620757.49172556
1987	2966123.10302573
1988	3326079.65367965
1989	3048150.75376885
1990	3200050.05412427
1991	3468048.18752684
2002	9750755.50139678
2003	11771371.2044407
2004	14778946.3240956
2005	17598373.5933292
2006	18908622.505667
2007	22293044.1732593
2008	25469589.5620603
2009	25345781.5731654
2010	28000156.0406652
2011	30366439.909525
2012	31643812.8465884
2013	32658493.7634032
2014	32516707.1385516
2015	34252413.481292
2016	34990520.1055974
2017	36418901.0884998
2018	36010658.3541147
2019	37190189.8854087
2020	35547004.5222033
2021	35126459.5324231