Year	Percent
1996-01-01	20.5871
1997-01-01	20.0440
1998-01-01	20.1279
1999-01-01	23.4937
2000-01-01	22.1175
2001-01-01	21.9116
2002-01-01	21.3853
2003-01-01	18.5888
2004-01-01	16.1602
2005-01-01	24.2564
2006-01-01	26.9107
2007-01-01	30.3030
2008-01-01	25.0385
2009-01-01	26.4725
2010-01-01	29.0348
2011-01-01	29.2204
2012-01-01	29.6315
2013-01-01	27.6594
2014-01-01	24.5866