Year	current US$
2000	519.13116455
2001	571.1116333
2002	557.902771
2003	612.15380859
2004	596.07177734
2005	639.24017334
2006	662.71893311
2007	711.56207275
2008	691.20733643
2009	606.90460205
2010	720.92443848
2011	713.99853516
2012	749.94378662
2013	735.49279785
2014	822.39221191
2015	784.64538574
2016	812.51092529
2017	785.4710083
2018	849.83349609
2019	801.54382324
2020	875.70098877
2021	923.4072876