Year	current US$
1990	28411529.323164
1991	32380580.0089199
1992	33273230.7997014
1993	36140860.1278494
1994	41918079.3348023
1995	41013701.7706402
1996	41590764.6224572
1997	38451004.82846
1998	28383452.8545433
1999	28963361.2418958
2000	27489793.8836248
2001	50569481.8630094
2002	46580234.8719973
2003	48320761.9097706
2004	50201717.598583
2005	56527971.5532703
2006	65239255.421077
2007	70816390.837512
2008	78174953.8556184
2009	75471990.787072
2010	78315059.314938
2011	86170709.9896126
2012	100845514.638626
2013	115579740.082128
2014	117857640.674916
2015	129614493.460848
2016	108468116.438381
2017	104446994.663437
2018	108081242.333157
2019	96560549.2865879
2020	96571783.6543627
2021	90223762.4091407