Year	current US$
1990	247332304.387745
1991	248960987.036283
1992	204207897.46861
1993	208384386.856525
1994	212404802.232218
1995	221782030.0182
1996	215392266.239059
1997	222777978.382337
1998	211798216.854048
1999	206901315.878797
2000	210306828.85308
2001	216892861.805143
2002	213045848.654033
2003	212329513.944196
2004	230767931.962881
2005	253614303.945121
2006	273173691.196942
2007	301831078.431783
2008	345292855.621082
2009	337582359.273545
2010	397877768.452508
2011	518345567.017563
2012	499820830.886938
2013	502714477.098714
2014	487758746.245903
2015	506388333.364717
2016	507533832.103832
2017	546152373.103036
2018	582086606.783792
2019	574415339.415541
2020	585526379.718203
2021	621127999.955981