Year	current US$
2003	15.0262661
2004	19.86405373
2005	25.16798592
2006	27.39763641
2007	30.08575439
2008	43.2732811
2009	49.87024689
2010	52.4311409
2011	64.27597809
2012	71.29358673
2013	102.54529572
2014	92.87577057
2015	101.42063141
2016	92.97782898
2017	86.74957275
2018	78.94738007
2019	79.26290131
2020	120.86974335
2021	134.9980011