Year	current US$
2000	283.3060028657525
2001	274.8642998986396
2002	235.65475632104182
2003	246.41632052850287
2004	280.43352892536416
2005	337.6998903691394
2006	393.438159148804
2007	467.2502363870039
2008	537.8742966466931
2009	532.0495349348182
2010	635.7658781198963
2011	723.1702247413037
2012	724.0487092966182
2013	755.1831650559658
2014	757.1584067224042
2015	671.6387830973499
2016	642.9835017659113
2017	729.2578257361884
2018	668.7363964606949
2019	650.4805849228178
2020	586.7067507032424
2021	655.4667560723689