Year	Percent
1996-01-01	46.12270000000000
1997-01-01	49.12060000000000
1998-01-01	58.36920000000000
1999-01-01	41.45670000000000
2000-01-01	45.21080000000000
2001-01-01	61.04600000000001
2002-01-01	60.73200000000000
2003-01-01	57.70750000000000
2004-01-01	44.43870000000000
2005-01-01	43.58240000000000
2006-01-01	43.43500000000000
2007-01-01	41.04080000000000
2008-01-01	44.89110000000000
2009-01-01	50.37540000000000
2010-01-01	45.11590000000000
2011-01-01	38.91530000000000
2012-01-01	39.10250000000000
2013-01-01	41.48710000000000
2014-01-01	55.23150000000000