Year	current US$
1990	269054705.251589
1991	264741543.363144
1992	288008119.990394
1993	261473078.613246
1994	275283476.021143
1995	315788858.276604
1996	290422994.969305
1997	243153796.432556
1998	231049133.884189
1999	247587284.490748
2000	202476489.017711
2001	196486041.952043
2002	200698732.893545
2003	246702480.158451
2004	265551677.262201
2005	291828313.146622
2006	285049802.396929
2007	331257616.310542
2008	361940753.787888
2009	354817338.051393
2010	349181216.710937
2011	360002468.254322
2012	325421452.04653
2013	314507820.251092
2014	290240351.759343
2015	235693930.477104
2016	226899641.955397
2017	240917899.784865
2018	255604873.991425
2019	251835419.405367
2020	255031384.359857
2021	269280725.109899