Year	current US$
2002	226452777.509695
2003	258858045.738751
2004	291360732.397528
2005	305789660.408424
2006	315179707.321553
2007	382006874.522007
2008	386383556.667305
2009	388751420.844167
2010	465695495.147069
2011	563965976.802424
2012	572865974.350237
2013	576499437.950909
2014	558204849.511446
2015	518911676.30335
2016	447976055.428407
2017	446552343.466214
2018	411169323.875626
2019	398763777.205266
2020	434986717.76098