Year	Percent
1995-01-01	60.8083
1996-01-01	60.0265
1997-01-01	57.1198
1998-01-01	61.7773
1999-01-01	63.1130
2000-01-01	65.1139
2001-01-01	63.1623
2002-01-01	55.5636
2003-01-01	45.5416
2004-01-01	42.5886
2005-01-01	47.0227
2006-01-01	53.5496
2007-01-01	57.2634
2008-01-01	55.1161
2009-01-01	52.5603
2010-01-01	52.7529
2011-01-01	52.4932
2012-01-01	48.9917
2013-01-01	44.7759
2014-01-01	38.1877
2015-01-01	37.5339
2016-01-01	34.5633