Year	current US$
2000	144.1492294816292
2001	150.74305785532638
2002	149.39183645488953
2003	145.88524516585946
2004	160.7834358891387
2005	179.82966406267346
2006	201.07035561123288
2007	235.04777121265616
2008	279.44841318364007
2009	304.4579305458693
2010	331.07340062351886
2011	379.0139571220246
2012	399.7359172339252
2013	418.3751926623759
2014	439.30008533899087
2015	421.9023951957055
2016	465.4873519045353
2017	471.88905817618166
2018	495.40313014229423
2019	484.290415381236
2020	489.61135794587847
2021	537.0598462309326