Year	Percent
1994-01-01	32.65
1995-01-01	39.16
1996-01-01	45.39
1997-01-01	53.15
1998-01-01	57.29
1999-01-01	65.43
2000-01-01	67.98
2001-01-01	65.68
2002-01-01	63.08
2003-01-01	65.79
2004-01-01	77.52
2005-01-01	83.78
2006-01-01	83.55
2007-01-01	85.57
2008-01-01	79.70
2009-01-01	85.91
2010-01-01	88.64
2011-01-01	88.96
2012-01-01	90.66
2013-01-01	94.24
2014-01-01	97.95
2015-01-01	100.12