Year	Percent
1999-01-01	3.4349300000000005
2000-01-01	3.2491600000000000
2001-01-01	2.6096100000000000
2002-01-01	0.7944080000000000
2003-01-01	1.1655600000000000
2004-01-01	2.3621400000000000
2005-01-01	3.7250500000000000
2006-01-01	5.1844500000000000
2007-01-01	3.9113599999999997
2008-01-01	2.3637300000000000
2009-01-01	3.5399400000000000
2010-01-01	13.5287000000000000
2011-01-01	9.4598700000000000
2012-01-01	8.5500200000000000
2013-01-01	7.9151300000000000
2014-01-01	10.1640000000000000
2015-01-01	10.1176000000000000
2016-01-01	13.6264000000000000