Year	US Dollars
1993	1.66258
1994	52.59128
1995	39.71846
1996	52.84757
1997	49.21705
1998	52.25843
1999	137.29326
2000	123.79402
2001	121.69747
2002	135.56371
2003	131.29738
2004	129.88649
2005	111.6427
2006	98.44488
2007	98.76397
2008	99.07675
2009	94.71046
2010	94.55456
2011	93.41091
2012	71.66757
2013	95.31344
2014	102.50204
2015	103.52493
2016	81.23079
2017	72.28241
2018	82.03382
2019	67.30409
2020	136.27782
2021	163.26149