Year	current international $
2000	4.692362215353858
2001	5.2725418048287045
2002	6.384810249398173
2003	6.233075854223314
2004	9.040139837082325
2005	10.874779021814541
2006	13.921449551530934
2007	14.120604773124711
2008	16.626111497336495
2009	19.520123962411883
2010	20.99575483223527
2011	23.69831689368721
2012	20.989843193930927
2013	23.37708206816147
2014	25.1241650454959
2015	24.158246399352628
2016	26.70224826200225
2017	29.277418072735635
2018	28.96247527955246
2019	28.880292680707846
2020	29.138061664704967
2021	32.32997389952502