Year	current US$
2003	12.09246693
2004	35.83777257
2005	35.16683309
2006	34.55283435
2007	63.16136878
2008	106.88071039
2009	106.61477217
2010	105.48747738
2011	119.39199235
2012	64.95168051
2013	75.80662798
2014	66.24980554
2015	34.33906337
2016	110.19421555
2017	81.41858065
2018	113.42293615
2019	118.28120441
2020	110.55043054
2021	122.82300216