Year	US Dollars
2003	13.29485
2004	32.8196
2005	6.28397
2006	155.42457
2007	171.54455
2008	169.3278
2009	123.71137
2010	129.26442
2011	204.21591
2012	166.11317
2013	188.63278
2014	161.49627
2015	160.66632
2016	137.76248
2017	189.58084
2018	251.06593
2019	154.10882
2020	329.96622
2021	213.013