Year	Percent
1999-01-01	5.6692200000000000
2000-01-01	6.4411000000000000
2001-01-01	6.2168600000000000
2002-01-01	6.2554099999999995
2003-01-01	6.1458800000000000
2004-01-01	8.7501800000000000
2005-01-01	13.9352000000000000
2006-01-01	18.9610000000000000
2007-01-01	21.2169000000000000
2008-01-01	12.3641000000000000
2009-01-01	15.7807000000000000
2010-01-01	15.2709999999999990
2011-01-01	11.3246000000000000
2012-01-01	13.3856000000000000
2013-01-01	15.5239000000000000
2014-01-01	15.6221000000000000
2015-01-01	18.1353000000000000
2016-01-01	17.0273000000000000