Year	current US$
2000	10.61979934
2001	11.23149308
2002	11.75038399
2003	28.45384543
2004	28.50715003
2005	35.57566745
2006	46.3081923
2007	49.0535852
2008	58.27820349
2009	50.64806716
2010	58.11111794
2011	62.10143565
2012	66.33239727
2013	71.50621232
2014	76.25141167
2015	69.21813283
2016	58.82334356
2017	56.31849299
2018	49.89845276
2019	49.82018908
2020	52.09520444
2021	63.92290481