Year	current international $
2000	4.899243625423006
2001	6.1158829978909806
2002	7.155202272141869
2003	7.507955418785657
2004	9.673376677540341
2005	11.53388102035109
2006	14.985358352522402
2007	14.555871913047266
2008	14.91879837162896
2009	18.00912926077986
2010	19.130962233518844
2011	21.890934373209074
2012	20.85400628034988
2013	22.192687896946776
2014	22.880221625765312
2015	22.147660779438528
2016	23.93530787865468
2017	24.729961643984137
2018	25.54183404311161
2019	26.367144620756232
2020	24.87880774512523
2021	31.322395570344696