Year	US Dollars
1993	6.35972
1994	6.7736
1995	8.77937
1996	8.11301
1997	10.94379
1998	11.24571
1999	11.71732
2000	10.46733
2001	9.08072
2002	10.63667
2003	13.34919
2004	13.00785
2005	13.89779
2006	14.61334
2007	15.90364
2008	22.04869
2009	20.99206
2010	20.01104
2011	26.63771
2012	20.05512
2013	24.04405
2014	19.68589
2015	25.41802
2016	20.91869
2017	17.91646
2018	16.06166
2019	16.61076
2020	20.45953
2021	17.5043