Year	current US$
1990	16638929.4890735
1991	11567105.3911275
1992	7119100.39767878
1993	11019568.7415866
1994	14775865.605412
1995	14861389.7172709
1996	18039250.6551666
1997	14079303.8721531
1998	14485355.1401822
1999	15290415.4295963
2000	14792030.5393194
2001	14569020.3102981
2002	15775999.3368692
2003	19955085.3009366
2004	24154729.9527344
2005	25532934.0857363
2006	25543243.2744904
2007	27889137.9630185
2008	32221625.4724588
2009	29752325.3251565
2010	28019771.1262703
2011	34572005.27845
2012	34093597.7867898
2013	32349048.606078
2014	33258200.9264936
2015	28289397.8728105
2016	29883923.2346395
2017	32397852.1367774
2018	37403847.0249333
2019	36657749.1555419
2020	36614593.7488053
2021	40411911.2601736