Year	current international $
2003	2.366901531875527
2004	4.687844518009452
2005	3.939454579466373
2006	5.886160977489838
2007	7.115312473474283
2008	4.032838561939528
2009	5.843640408471761
2010	3.592868095478974
2011	4.896351648396499
2012	4.084244081838297
2013	4.062180366098138
2014	6.428812265943324
2015	3.5958417993724936
2016	4.480402748510876
2017	4.5783406886403455
2018	4.283657330426931
2019	5.879805639669941
2020	7.010282070179449
2021	9.770193439357707