Year	current US$
2000	35.74236679
2001	33.86995316
2002	39.82229614
2003	46.68310547
2004	40.42881012
2005	45.57660675
2006	53.81796265
2007	55.77771378
2008	56.53337097
2009	57.57979965
2010	56.37421417
2011	62.67469025
2012	65.69985962
2013	61.38714981
2014	66.44046021
2015	80.65351105
2016	69.79541779
2017	65.55883026
2018	64.47797394
2019	62.30675125
2020	62.75099945
2021	87.74766541