Year	Percent
1996-01-01	39.952500000000000
1997-01-01	39.554500000000000
1998-01-01	40.280900000000000
1999-01-01	39.270200000000000
2000-01-01	38.745800000000000
2001-01-01	38.916000000000000
2002-01-01	40.775400000000000
2003-01-01	47.444500000000000
2004-01-01	46.745100000000000
2005-01-01	46.330000000000000
2006-01-01	50.459900000000000
2007-01-01	45.037500000000000
2008-01-01	46.915400000000000
2009-01-01	60.518100000000000
2010-01-01	59.154600000000000
2011-01-01	59.096300000000000
2012-01-01	60.341000000000000
2013-01-01	61.571000000000005
2014-01-01	64.506300000000000
2015-01-01	76.435500000000000
2016-01-01	69.793700000000000