Year	current US$
1995	16961333528.964
1996	16393506456.3107
1997	15130310390.2253
1998	12852452425.416
1999	13107777106.0445
2000	11815582721.7213
2001	12179167197.6772
2002	14959726938.8554
2003	18442008271.3299
2004	20230064932.4487
2005	20027157791.1982
2006	20290363195.8048
2007	21555715642.7024
2008	25690709430.1542
2009	25983834213.9509
2010	27367251654.7991
2011	33074239534.9954
2012	32267271684.4063
2013	31280494587.6504
2014	31909309374.7939
2015	30767623243.5415
2016	30298121031.2554
2017	30397138027.0701
2018	30886662018.3137
2019	30857443131.5393
2020	31724539782.3998
2021	34881691879.2398