Year	Percent
1996-01-01	7.8684899999999995
1997-01-01	12.0788000000000000
1998-01-01	14.2931000000000000
1999-01-01	12.8224000000000000
2000-01-01	10.6423000000000000
2001-01-01	12.8909999999999980
2002-01-01	13.0619000000000000
2003-01-01	15.9056000000000000
2004-01-01	17.3751000000000000
2005-01-01	15.1035000000000000
2006-01-01	15.1263000000000000
2007-01-01	13.8509999999999990
2008-01-01	16.5549000000000000
2009-01-01	18.1601000000000000
2010-01-01	18.8577000000000000
2011-01-01	21.5528000000000000
2012-01-01	18.2443000000000000
2013-01-01	18.4360000000000000
2014-01-01	20.3869000000000000