Year	Percent
1999-01-01	6.602110000000001
2000-01-01	7.990150000000000
2001-01-01	8.237230000000000
2002-01-01	8.863590000000000
2003-01-01	8.844900000000000
2004-01-01	8.322750000000000
2005-01-01	6.788030000000000
2006-01-01	8.251339999999999
2007-01-01	9.764110000000000
2008-01-01	9.993660000000000
2009-01-01	24.977400000000000
2010-01-01	30.721100000000000
2011-01-01	28.195900000000000
2012-01-01	32.773200000000000
2013-01-01	43.722100000000000
2014-01-01	55.388200000000000
2015-01-01	57.934600000000000
2016-01-01	48.268500000000000