Year	current US$
1990	100745873.131729
1991	50778328.8773468
1992	101086223.471367
1993	78911844.9337629
1994	94878077.8677757
1995	72418489.4394561
1996	57048999.1683973
1997	38891564.1388434
1998	44039617.2520159
1999	31799296.7098106
2000	21042164.3085427
2001	23343524.4447254
2002	22649774.2524548
2003	23921854.5243494
2004	26777600.9060353
2005	26120706.1330724
2006	28853325.0334609
2007	34186687.9516233
2008	43430971.1447465
2009	41664281.4892932
2010	45016484.6027646
2011	50950502.0153854
2012	58284722.1062501
2013	62567371.6550411
2014	68108318.5328577
2015	61114537.9773967
2016	50299403.1909469
2017	51959801.3825244
2018	51217794.9880442
2019	52176744.0559567
2020	51326318.567235
2021	52328334.4816978