Year	Percent
1995-01-01	6.1180699999999995
1996-01-01	5.9855599999999995
1997-01-01	7.0055600000000010
1998-01-01	7.1235399999999990
1999-01-01	7.4198500000000000
2000-01-01	8.7934399999999990
2001-01-01	10.1672000000000000
2002-01-01	10.8316000000000000
2003-01-01	11.2085000000000000
2004-01-01	12.8312000000000000
2005-01-01	14.6621000000000000
2006-01-01	16.7505000000000000
2007-01-01	19.6148000000000000
2008-01-01	19.7842000000000000
2009-01-01	18.8613000000000000
2010-01-01	20.2575000000000000
2011-01-01	22.3694000000000000
2012-01-01	23.6255000000000000
2013-01-01	27.0551000000000000
2014-01-01	30.3939000000000000
2015-01-01	33.4276000000000000
2016-01-01	37.4901000000000000