Year	US Dollars
2005	8.57868
2006	10.35805
2007	9.05151
2008	13.34574
2009	14.21656
2010	14.31523
2011	17.02027
2012	16.93361
2013	17.38286
2014	31.00846
2015	32.09791
2016	33.84804
2017	26.33594
2018	27.41284
2019	25.22698
2020	52.96242
2021	50.50419