Year	Percent
1999-01-01	10.8150000000000000
2000-01-01	7.5413500000000000
2001-01-01	5.6622100000000000
2002-01-01	5.4767100000000000
2003-01-01	7.9933500000000000
2004-01-01	11.8014000000000000
2005-01-01	15.3214000000000000
2006-01-01	22.0441000000000000
2007-01-01	29.3730000000000000
2008-01-01	6.7403300000000000
2009-01-01	8.5201300000000000
2010-01-01	5.7141699999999990
2011-01-01	2.5990599999999997
2012-01-01	4.2298900000000000
2013-01-01	5.5448699999999995
2014-01-01	7.1489800000000000
2015-01-01	8.4583100000000000
2016-01-01	7.6575000000000000