Year	Percent
1999-01-01	7.9588199999999990
2000-01-01	5.8127200000000000
2001-01-01	6.6698000000000000
2002-01-01	7.2695300000000005
2003-01-01	7.2695300000000005
2004-01-01	3.2243200000000000
2005-01-01	2.0098100000000000
2006-01-01	4.1449000000000000
2007-01-01	3.0391700000000000
2008-01-01	2.0514600000000000
2009-01-01	2.3813200000000000
2010-01-01	1.9196200000000000
2011-01-01	1.4315000000000000
2012-01-01	1.2197200000000001
2013-01-01	1.1331799999999999
2014-01-01	1.1331799999999999
2015-01-01	1.4801799999999998
2016-01-01	1.5505400000000000