Year	constant 2015 US$
2000	317.5844704937857
2001	285.5021939119326
2002	344.2241808349977
2003	347.4152392275147
2004	338.73939609288794
2005	363.5414673369772
2006	367.48584934899367
2007	410.8616103836936
2008	418.52317060468107
2009	490.272834014231
2010	544.689294061525
2011	527.1973365089566
2012	570.6760613641512
2013	582.1039758735258
2014	576.4878173248188
2015	566.881129708434
2016	564.9208406152346
2017	563.488236495596
2018	553.9733060375056
2019	559.1409539837177
2020	529.1449097269447
2021	407.61650524260085
2022	372.615894847401