Year	current US$
1977	8630000.03062189
1980	16969999.93175268
1981	11570000.002160674
1982	10410000.003874302
1983	10440000.044181934
1984	11860000.03665686
1985	13400000.026449557
1986	8379999.9076873
1987	10119999.818503857
1988	12439999.945461748
1989	14639999.95961785
1990	13680000.009015206
1991	11729999.959468838
1992	12340000.173076991
1993	12409999.970346693
1994	23759999.901056286
1995	25759999.999776483
1996	20640000.056475397
1997	23550000.15161931
1998	20210000.077262517
1999	15940000.204369435
2000	12550000.160932552
2001	20159999.962896105
2002	43869999.984279305
2003	28630000.239238165
2004	17769999.966025352
2005	17559999.808669083
2006	17940000.042319294
2007	19569999.82893467
2008	25529999.509453773
2009	24819999.87363816
2010	29830000.10252
2011	23960000.127553944
2012	24973817.928577766
2013	24571080.207824703
2014	23404348.954558387
2015	19733674.138784416
2016	15365652.26316452
2017	13572640.20293951
2018	15602050.065994257
2019	25151190.191507347
2020	29024889.73736764
2021	28045850.247144688
2022	29942729.94995117