Year	Percent
1996-01-01	40.150300000000000
1997-01-01	60.955000000000000
1998-01-01	55.575600000000000
1999-01-01	52.370200000000000
2000-01-01	61.916000000000004
2001-01-01	48.621100000000000
2002-01-01	45.953000000000000
2003-01-01	45.613800000000000
2004-01-01	37.990100000000000
2005-01-01	36.457500000000000
2006-01-01	30.781999999999996
2007-01-01	30.518800000000000
2008-01-01	47.717400000000000
2009-01-01	33.719100000000000
2010-01-01	48.683200000000000
2011-01-01	49.665900000000000
2012-01-01	45.287100000000000
2013-01-01	42.220600000000000
2014-01-01	48.145600000000000