Year	US Dollars
1992	2.09328
1993	4.5402
1994	11.45763
1995	11.00035
1996	17.08861
1997	14.04921
1998	26.08333
1999	18.19675
2000	17.81764
2001	25.37757
2002	23.64809
2003	19.97754
2004	33.65875
2005	32.66925
2006	29.30392
2007	27.326
2008	31.96886
2009	39.93388
2010	50.90019
2011	36.24105
2012	49.5489
2013	47.9991
2014	42.81108
2015	50.70939
2016	41.2283
2017	36.76983
2018	44.23139
2019	38.73513
2020	80.47924
2021	56.07143