Year	current US$
1995	9302820820.77271
1996	9706743733.27766
1997	9746494271.17408
1998	12534581982.7469
1999	10260700618.3526
2000	7688539419.002
2001	5533594265.30333
2002	2419676465.32013
2003	3899122429.62286
2004	1429223104.09667
2005	9307639630.14616
2006	12172750190.4089
2007	23359074174.694
2008	28770175806.3537
2009	19796218410.9163
2010	18351140692.2509
2011	31701257207.1148
2012	25871856277.4128
2013	26441003821.8064
2014	31547687297.6657
2015	36049845757.2865
2016	33436724884.071
2017	37156636820.621
2018	45012948020.3712
2019	49944873042.4561
2020	51043504470.6575
2021	56842610984.9375