Year	Percent
1998-01-01	5.000000000000000
1999-01-01	4.800000000000000
2000-01-01	5.100000000000000
2001-01-01	4.800000000000000
2002-01-01	4.700000000000000
2003-01-01	4.300000000000000
2004-01-01	4.800000000000000
2005-01-01	3.100000000000000
2006-01-01	3.000000000000000
2007-01-01	3.300000000000000
2008-01-01	3.200000000000000
2009-01-01	4.300000000000000
2010-01-01	4.433160000000000
2011-01-01	4.279470000000000
2012-01-01	4.692700000000000
2013-01-01	4.783919999999999
2014-01-01	5.366740000000000
2015-01-01	5.555060000000000
2016-01-01	5.689040000000000