Year	current US$
1995	15996311808.8825
1996	17403984806.5565
1997	18029367703.2477
1998	18493232447.4427
1999	19578645239.1728
2000	20829880836.0407
2001	21443008688.2781
2002	21247271543.329
2003	22673296819.441
2004	24423727277.248
2005	25865669306.0331
2006	27077587900.2037
2007	30834826442.3412
2008	35795358181.6045
2009	34499212502.445
2010	36639367413.5196
2011	40332024750.5304
2012	40201631823.3808
2013	43896781899.0993
2014	46516491803.5838
2015	45137037857.6669
2016	47349215772.1594
2017	51637121010.0343
2018	55523180598.0308
2019	58372856934.2519
2020	63492249588.1791
2021	72364633517.1668