Year	constant 2015 US$
2001	1465.7844735261128
2002	1606.7622485861853
2003	1632.0503200386638
2004	1729.2240848891968
2005	1694.1344592770429
2006	1653.5358769854615
2007	1607.1852269469991
2008	1660.9453685011947
2009	1656.420998716636
2010	1739.3769405926907
2011	1765.341880424655
2012	1755.2937169022323
2013	1765.7131613661977
2014	1711.799221449638
2015	1696.4894330369489
2016	1643.2623387282551
2017	1610.4273991195764
2018	1574.9863252097823
2019	1553.1593656141877
2020	1455.243138467709
2021	1448.5858913421805
2022	1410.95794986283