Year	current US$
1990	126144205.492361
1991	139236585.644106
1992	149364743.487699
1993	143024639.704706
1994	139407888.911609
1995	131163671.71203
1996	131954436.532646
1997	150991636.301335
1998	148423029.395688
1999	145913281.710999
2000	152390828.428123
2001	156225069.372049
2002	167267927.880289
2003	190796974.94511
2004	209372511.370739
2005	233825779.087073
2006	275402137.350634
2007	311099235.468855
2008	351842757.984956
2009	386644677.784711
2010	433531942.333538
2011	495449527.366598
2012	541240247.941929
2013	605777727.176586
2014	687220144.352975
2015	721883729.435675
2016	790413317.999067
2017	851238861.673232
2018	910122243.35541
2019	911001096.360326
2020	860380175.080998
2021	974465190.236202