Year	Percent
1996-01-01	41.5664
1997-01-01	13.4557
1998-01-01	76.6975
1999-01-01	52.8539
2000-01-01	77.6220
2001-01-01	68.3691
2002-01-01	70.9741
2003-01-01	63.2102
2004-01-01	78.7172
2005-01-01	68.3545
2006-01-01	69.2205
2007-01-01	49.8702
2008-01-01	31.5582
2009-01-01	71.5906
2010-01-01	73.7842
2011-01-01	74.0577
2012-01-01	73.9938
2013-01-01	54.7836
2014-01-01	45.3026