Year	current US$
1990	14056414.82912
1991	16011566.8863967
1992	17682642.2783643
1993	20612374.5456783
1994	22111965.5731648
1995	23695068.8990264
1996	25626856.7934331
1997	26820882.7640529
1998	30643278.2720048
1999	39052216.5163258
2000	45104715.3569231
2001	49875581.153561
2002	52598706.5286799
2003	57785427.9193536
2004	61112946.9432167
2005	68868089.7394958
2006	80928501.9742675
2007	87561046.1045709
2008	93126957.4558891
2009	94451773.3944544
2010	104596370.347464
2011	108575332.048164
2012	115891281.647815
2013	123482972.552697
2014	132999491.585379
2015	137700364.382748
2016	145082677.935374
2017	156029279.91744
2018	161808223.989798
2019	170048102.7475
2020	147514144.800766
2021	160278087.018995