Year	current US$
1990	267730441.485281
1991	274083876.058635
1992	311080228.439386
1993	333395956.977313
1994	390766012.836432
1995	422710007.928245
1996	447788571.247199
1997	468009483.280769
1998	430678987.202731
1999	394003953.192567
2000	430208195.931618
2001	393441552.789517
2002	383796502.762244
2003	327400697.204513
2004	359988814.371851
2005	401205277.338463
2006	415851661.421786
2007	480859284.345211
2008	559743512.085863
2009	571028522.176661
2010	668163664.819321
2011	696017452.289764
2012	718370419.817958
2013	676001304.955921
2014	633852152.215496
2015	484450687.585544
2016	463186933.551184
2017	513749940.12067
2018	538708234.243774
2019	507258544.716491
2020	461184334.766806
2021	489809229.157066