Year	Percent
1999-01-01	0.07
2000-01-01	0.04
2001-01-01	0.03
2002-01-01	0.04
2003-01-01	0.05
2004-01-01	0.14
2005-01-01	0.20
2006-01-01	0.59
2007-01-01	1.44
2008-01-01	0.45
2009-01-01	0.52
2010-01-01	0.64
2011-01-01	0.71
2012-01-01	0.64
2013-01-01	0.94
2014-01-01	1.03
2015-01-01	0.98
2016-01-01	1.23