Year	Percent
1996-01-01	30.444900000000000
1997-01-01	31.534700000000000
1998-01-01	30.239400000000000
1999-01-01	29.972900000000000
2000-01-01	39.923800000000000
2001-01-01	41.736999999999995
2002-01-01	38.318700000000000
2003-01-01	41.451700000000000
2004-01-01	38.920000000000000
2005-01-01	42.033500000000000
2006-01-01	44.546800000000000
2007-01-01	39.697400000000000
2008-01-01	32.248400000000000
2009-01-01	37.524600000000000
2010-01-01	37.071300000000000
2011-01-01	36.726400000000000
2012-01-01	36.576700000000000
2013-01-01	38.035500000000000
2014-01-01	35.426700000000000