Year	current US$
2000	31.09416771
2001	35.96975327
2002	35.96072769
2003	37.33245468
2004	46.10057831
2005	46.69151688
2006	54.01427841
2007	64.43791199
2008	57.31074142
2009	59.43021393
2010	71.98933411
2011	77.32337952
2012	83.64318848
2013	85.9859848
2014	86.81033325
2015	96.52057648
2016	97.18308258
2017	103.39090729
2018	101.69933319
2019	115.32080841
2020	133.70314026
2021	120.43117523