Year	US Dollars
1991	0.04126
1992	1.0065
1993	3.18487
1994	19.61943
1995	15.55528
1996	12.41273
1997	23.48228
1998	15.21041
1999	21.42119
2000	17.47012
2001	28.46804
2002	42.92855
2003	36.68039
2004	21.16776
2005	25.07194
2006	24.02602
2007	24.85754
2008	25.68638
2009	24.31811
2010	17.28233
2011	31.37113
2012	30.85162
2013	-7.52166
2014	22.7308
2015	7.21086
2016	8.14014
2017	12.53598
2018	8.79497
2019	11.88015
2020	12.16076
2021	0.91144