Year	current US$
2000	1.9903616253578116
2001	1.5418122040354674
2002	1.8076140786997756
2003	1.8730428724418673
2004	2.927760887965988
2005	3.6782380569124746
2006	4.698138017979108
2007	5.273288624342234
2008	6.920648203406157
2009	7.851901935178749
2010	8.243537274534486
2011	9.61124915862107
2012	9.058346518372463
2013	9.858784302734849
2014	10.562411240536088
2015	9.506918394528492
2016	9.423889206253287
2017	10.26422911726817
2018	10.235183924534544
2019	10.173627699649783
2020	10.43963306346415
2021	11.338267554169912