Year	2010 U.S. Dollars
1990-01-01	13988.6576013303
1991-01-01	12393.6000763997
1992-01-01	12318.2205105389
1993-01-01	12313.0403168074
1994-01-01	12666.6885060568
1995-01-01	13462.9867988646
1996-01-01	14047.8433198682
1997-01-01	13979.3629745467
1998-01-01	13946.6180704246
1999-01-01	14160.9123751952
2000-01-01	14806.5834697881
2001-01-01	15294.6292874275
2002-01-01	15577.3922047072
2003-01-01	16143.2636401860
2004-01-01	16930.1897024746
2005-01-01	18011.3866987870
2006-01-01	19193.7548219261
2007-01-01	20151.1781213239
2008-01-01	20520.7799619681
2009-01-01	19424.2730588798
2010-01-01	19808.0710912518
2011-01-01	20118.5878140405
2012-01-01	19929.7640673633
2013-01-01	19826.7919430607
2014-01-01	20343.6837534468
2015-01-01	21381.7030808320
2016-01-01	21894.1126524738
2017-01-01	22779.2918994314