Year	Percent
1996-01-01	81.8182
1997-01-01	53.5211
1998-01-01	53.5211
1999-01-01	53.5211
2000-01-01	82.7477
2001-01-01	74.9154
2002-01-01	70.0608
2003-01-01	53.1946
2004-01-01	54.1056
2005-01-01	42.3423
2006-01-01	40.9217
2007-01-01	38.7385
2008-01-01	32.1891
2009-01-01	19.9306
2010-01-01	24.7065
2011-01-01	34.0023
2012-01-01	26.9869
2013-01-01	25.0195
2014-01-01	29.4785