Year	Percent
1996-01-01	63.04500000000000
1997-01-01	70.51560000000000
1998-01-01	63.93730000000000
1999-01-01	70.17699999999999
2000-01-01	74.09240000000000
2001-01-01	73.56030000000000
2002-01-01	70.17780000000000
2003-01-01	62.00010000000000
2004-01-01	51.06270000000000
2005-01-01	54.89660000000000
2006-01-01	58.38950000000000
2007-01-01	55.94890000000000
2008-01-01	48.67070000000000
2009-01-01	44.19870000000000
2010-01-01	46.13470000000000
2011-01-01	55.91890000000000
2012-01-01	53.74570000000000
2013-01-01	49.36890000000000
2014-01-01	44.00410000000000