Year	Percent
1998-01-01	6.400000000000000
1999-01-01	6.800000000000000
2000-01-01	6.700000000000000
2001-01-01	6.700000000000000
2002-01-01	6.800000000000000
2003-01-01	5.400000000000000
2004-01-01	5.100000000000000
2005-01-01	4.400000000000000
2006-01-01	4.500000000000000
2007-01-01	4.100000000000000
2008-01-01	3.700000000000000
2009-01-01	4.100000000000000
2010-01-01	4.877759999999999
2011-01-01	4.753580000000000
2012-01-01	5.201270000000000
2013-01-01	5.818300000000000
2014-01-01	5.282410000000000
2015-01-01	5.793970000000000
2016-01-01	5.704210000000000