Year	current US$
1990	27991653.6683338
1991	29845560.6762435
1992	20361830.5023589
1993	27202725.5908952
1994	33094729.930697
1995	39287952.9487082
1996	45682657.7622067
1997	50661667.4432111
1998	55294854.0885896
1999	56448203.8735982
2000	66079336.0784552
2001	85390100.0294429
2002	92098125.4891613
2003	105484671.655631
2004	117592781.511806
2005	117494547.918222
2006	132428462.028385
2007	153489359.84869
2008	174176924.37764
2009	180342130.50396
2010	184901223.58817
2011	224906037.337296
2012	263473997.398735
2013	325839888.916844
2014	415497145.986136
2015	448221648.250252
2016	537595977.213231
2017	591938397.006287
2018	675441565.920339
2019	748701010.338579
2020	845045615.927514
2021	979885475.463556