Year	current US$
1990	98381964.3276537
1991	74620913.7657813
1992	63373430.4901566
1993	68915486.6064142
1994	83274653.4045207
1995	114845020.348938
1996	119180353.941163
1997	127084093.967035
1998	136356823.008611
1999	122251488.044448
2000	128336237.807648
2001	120278296.067073
2002	119811884.170749
2003	122532498.962893
2004	145567633.549075
2005	167515146.283799
2006	170803445.240993
2007	194232190.352698
2008	221632817.862971
2009	374828129.014308
2010	400256065.575591
2011	401444905.669365
2012	398048750.703886
2013	434653182.59415
2014	483518302.450649
2015	449136476.782476
2016	397360592.534552
2017	378223697.723978
2018	374405704.749426
2019	367060784.816898
2020	365661627.371389
2021	363204228.856939