Year	current US$
2000	27.84662464
2001	25.71782203
2002	26.16735661
2003	28.01416525
2004	29.66923433
2005	32.9287554
2006	29.01265596
2007	30.57307395
2008	36.68200323
2009	40.29518834
2010	44.20387731
2011	45.02625066
2012	48.17792085
2013	49.51516728
2014	51.43677248
2015	62.38822396
2016	63.47038775
2017	69.13170286
2018	79.90600076
2019	81.62643986
2020	90.173896
2021	107.66928237