Year	current US$
1990	24937277785.1358
1991	32152508838.81
1992	31335783566.9605
1993	24688518762.3871
1994	20065146967.3972
1995	20709612168.918
1996	23366656140.6142
1997	22701703667.4104
1998	24647967882.0169
1999	24088108184.0471
2000	24042244778.3243
2001	27356554883.4302
2002	28472549024.876
2003	31463577680.9425
2004	35270669284.3547
2005	41743779934.0633
2006	46305748907.2967
2007	54812312580.6078
2008	64859289410.3157
2009	51282330706.0992
2010	54228435005.0264
2011	57404144709.9906
2012	55412252428.2528
2013	59904132101.7525
2014	62617530486.4522
2015	55174161007.5364
2016	55887440379.1937
2017	60326780108.4399
2018	66785447278.2418
2019	67416002511.0159
2020	70706977463.8505
2021	75493151049.2944