Year	current US$
2003	6.89100123
2004	7.79160423
2005	10.12390728
2006	10.93988977
2007	5.14821722
2008	21.11171712
2009	22.14456238
2010	26.64465476
2011	33.40672935
2012	42.30392673
2013	53.42837834
2014	50.40385541
2015	58.25115503
2016	46.15527838
2017	57.24564865
2018	48.74410377
2019	45.71874847
2020	66.81482286
2021	85.64718663