Year	Percent
1996-01-01	48.5134
1997-01-01	44.1552
1998-01-01	42.4569
1999-01-01	41.8111
2000-01-01	37.8262
2001-01-01	21.7388
2002-01-01	16.9387
2003-01-01	17.1659
2004-01-01	15.4464
2005-01-01	16.2279
2006-01-01	15.7843
2007-01-01	19.4786
2008-01-01	23.6762
2009-01-01	20.4000
2010-01-01	15.1803
2011-01-01	19.9447
2012-01-01	24.2347
2013-01-01	20.7391
2014-01-01	16.9981
2015-01-01	15.7531
2016-01-01	13.8304