Year	US Dollars
1992	4.66847
1993	21.03527
1994	37.90392
1995	53.651
1996	44.1254
1997	39.96252
1998	41.1428
1999	42.05644
2000	39.47207
2001	26.17136
2002	31.76308
2003	34.5607
2004	40.49406
2005	46.07562
2006	51.84731
2007	48.31068
2008	59.46566
2009	51.90497
2010	68.29054
2011	79.40014
2012	83.90819
2013	94.31604
2014	107.37212
2015	130.05255
2016	85.44946
2017	75.01694
2018	69.42019
2019	68.66578
2020	73.71997
2021	70.09035