Year	Percent
1995-01-01	0.79
1996-01-01	0.96
1997-01-01	1.06
1998-01-01	1.07
1999-01-01	1.61
2000-01-01	1.56
2001-01-01	1.65
2002-01-01	1.51
2003-01-01	1.61
2004-01-01	1.70
2005-01-01	2.15
2006-01-01	2.21
2007-01-01	2.51
2008-01-01	1.45
2009-01-01	1.62
2010-01-01	3.03
2011-01-01	2.93
2012-01-01	3.24
2013-01-01	3.45
2014-01-01	3.87
2015-01-01	4.09
2016-01-01	4.57