Year	Percent
1996-01-01	41.3402
1997-01-01	40.6417
1998-01-01	40.3285
1999-01-01	37.2660
2000-01-01	58.8645
2001-01-01	64.3809
2002-01-01	66.1023
2003-01-01	72.0881
2004-01-01	50.8071
2005-01-01	27.5212
2006-01-01	33.1386
2007-01-01	45.7150
2008-01-01	57.1648
2009-01-01	54.1961
2010-01-01	64.1956
2011-01-01	63.8150
2012-01-01	59.6837
2013-01-01	54.3480
2014-01-01	59.9876