Year	current US$
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	76300000
1991	234663157.89473686
1992	79234741.78403756
1993	59107323.65845427
1994	57000872.26206629
1995	76953416.33044292
1996	82289484.19319369
1997	84669932.53079152
1998	85271508.09034404
1999	93290042.35380694
2000	127143681.05884989
2001	162724439.20114604
2002	167613625.0584409
2003	178453179.30469063
2004	227134394.06722465
2005	258650715.19007158
2006	343523073.37011117
2007	420254331.1074352
2008	577126920.3226308
2009	411580097.5104239
2010	735677814.1206347
2011	1308812704.5187273
2012	1365973219.0368156
2013	1429578053.942855
2014	1141582345.0303035
2015	957049635.0433922
2016	930122974.0706868
2017	1041090272.2424449
2018	1423051809.1621048
2019	1507053204.3219252
2020	1263963352.4286344
2021	1546429302.669993
2022	1831860543.263532
2023	1935599615.29632