Year	current US$
1990	13214605227.2416
1991	14141159688.9954
1992	14937278105.2371
1993	15530933449.3461
1994	16998097614.5816
1995	17901395246.096
1996	18856750582.2834
1997	19414180096.0564
1998	19349946292.5306
1999	20685604068.5476
2000	21951147089.8151
2001	22713378471.0135
2002	24316322055.2647
2003	25529601028.7509
2004	26692237500.4872
2005	28217767507.5889
2006	29171537769.7191
2007	31549530305.7479
2008	31084006065.3922
2009	30406289271.1255
2010	33050165437.109
2011	36197344854.5187
2012	38949723095.438
2013	40819851943.1359
2014	40981351542.9978
2015	41012451549.1683
2016	41937155379.5093
2017	43225347408.5718
2018	43729357906.097
2019	44105255153.5266
2020	42696084205.0009
2021	45384463482.8704