Year	current US$
1990	191775180.800734
1991	170245821.433032
1992	137967860.66424
1993	123378123.404188
1994	114926089.3008
1995	111863507.290351
1996	115084465.045526
1997	110763663.432058
1998	81200863.1759154
1999	88796554.9082193
2000	91726254.3173478
2001	92090066.4392156
2002	94154145.7519582
2003	97847847.346565
2004	99019913.801429
2005	98239996.2018448
2006	92331119.3367892
2007	90374505.80019
2008	95584953.0105873
2009	189761890.611752
2010	204474926.141218
2011	223176852.681682
2012	251718132.825411
2013	291299183.126761
2014	319096218.237038
2015	337453485.105617
2016	349918697.664446
2017	283331014.970047
2018	520956663.478081
2019	347206593.645938
2020	354003163.54983