Year	Percent
1996-01-01	24.0289
1997-01-01	50.9504
1998-01-01	43.3320
1999-01-01	22.4188
2000-01-01	37.6885
2001-01-01	27.7621
2002-01-01	25.8647
2003-01-01	25.8879
2004-01-01	24.1626
2005-01-01	20.7161
2006-01-01	20.0384
2007-01-01	21.2447
2008-01-01	21.8505
2009-01-01	22.5704
2010-01-01	24.2268
2011-01-01	23.5704
2012-01-01	23.1785
2013-01-01	22.9656
2014-01-01	22.0517