Year	current US$
2001	31981643621.511234
2002	31276552539.142273
2003	39387822818.243706
2004	45073880272.29408
2005	64633271449.965965
2006	82306213914.22737
2007	85548782491.49081
2008	108271884302.24643
2009	95025112920.35399
2010	148712514091.2185
2011	191281002804.629
2012	227763181293.39688
2013	224972882477.8761
2014	223815632375.76584
2015	198939589598.36624
2016	195296120571.81757
2017	195713324901.2934
2018	215430924792.37576
2019	202945487215.79306
2020	158588049203.53983