Year	Percent
1995-01-01	4.7146200000000000
1996-01-01	3.6108500000000000
1997-01-01	3.8062699999999996
1998-01-01	5.2546800000000005
1999-01-01	5.4936300000000005
2000-01-01	4.9141300000000000
2001-01-01	4.4678600000000000
2002-01-01	4.9102600000000000
2003-01-01	5.6557200000000000
2004-01-01	7.2099100000000010
2005-01-01	8.2304600000000000
2006-01-01	9.3380000000000000
2007-01-01	10.1528000000000000
2008-01-01	9.5697300000000000
2009-01-01	10.7242000000000000
2010-01-01	11.6698000000000000
2011-01-01	10.7453000000000000
2012-01-01	12.0828000000000000
2013-01-01	14.4057000000000000
2014-01-01	16.3657000000000000
2015-01-01	18.8051000000000000
2016-01-01	19.9014000000000000