Year	Percent
1994-01-01	0.04
1995-01-01	0.26
1996-01-01	0.67
1997-01-01	1.21
1998-01-01	1.93
1999-01-01	2.97
2000-01-01	4.54
2001-01-01	5.86
2002-01-01	7.43
2003-01-01	8.62
2004-01-01	9.80
2005-01-01	12.48
2006-01-01	12.89
2007-01-01	13.50
2008-01-01	13.73
2009-01-01	17.71
2010-01-01	20.22
2011-01-01	17.65
2012-01-01	18.96
2013-01-01	18.64
2014-01-01	20.41
2015-01-01	20.87
2016-01-01	22.11