Year	constant 2015 US$
2000	5939.5124359084775
2001	6219.874002363429
2002	6340.423131775423
2003	6727.62313788054
2004	7038.6201508440845
2005	7638.58762491205
2006	8125.594835771462
2007	8664.052382988812
2008	9012.779795688528
2009	8265.843318791634
2010	8386.750257151367
2011	8644.046292129548
2012	8948.486749546628
2013	9161.143586240843
2014	9183.921691393018
2015	9356.524079389963
2016	9612.68732368308
2017	9986.477168685948
2018	10059.6728779499
2019	10365.036494616112
2020	9482.022113274039
2021	9830.883462785072