Year	current US$
1990	5125097972.41461
1991	4680353510.86161
1992	4643034405.85632
1993	4212666083.22062
1994	4274930747.92243
1995	3102195954.42958
1996	3388240992.64077
1997	3366450372.82518
1998	3049172895.65063
1999	2400782106.91973
2000	2958632494.98885
2001	3394939067.35779
2002	3763570008.1942
2003	4452692213.58001
2004	6046333664.13055
2005	7895442272.03734
2006	11278112899.3918
2007	14230877673.2872
2008	17664076955.413
2009	16153248174.3659
2010	20370576498.9311
2011	24472916454.7866
2012	25031549544.9225
2013	28612258744.5711
2014	27174085434.7508
2015	23448276561.9003
2016	14640734451.7185
2017	17565389063.2238
2018	18550478117.8616
2019	19261378460.4098
2020	18355382799.9437
2021	20938032045.7284