Year	current US$
2000	46.70821561201143
2001	48.295142576155946
2002	48.246672278286525
2003	46.22648482194848
2004	52.86438264283725
2005	59.83445608967186
2006	63.23116094715414
2007	76.21845752251585
2008	92.81345765971994
2009	104.76715865123737
2010	123.30757895038779
2011	137.75468704470404
2012	148.4317547752695
2013	136.97286871305974
2014	125.92900818593684
2015	128.40376649404814
2016	138.89749189975828
2017	136.6006578280838
2018	145.11486316454614
2019	135.62056777276524
2020	122.66445195227965
2021	129.05096314293948