Year	Percent
1999-01-01	5.5369000000000000
2000-01-01	5.7658200000000000
2001-01-01	9.2033500000000000
2002-01-01	11.7926000000000000
2003-01-01	14.0903000000000000
2004-01-01	11.6594000000000000
2005-01-01	9.0703700000000000
2006-01-01	7.6048100000000005
2007-01-01	6.2093900000000000
2008-01-01	6.1585700000000000
2009-01-01	7.8305800000000000
2010-01-01	9.6015000000000000
2011-01-01	10.7591000000000000
2012-01-01	12.6561000000000000
2013-01-01	14.8028000000000000
2014-01-01	19.9016000000000000
2015-01-01	21.3906000000000000
2016-01-01	22.3124000000000000