Year	Percent
1996-01-01	2.5743300000000000
1997-01-01	1.3822400000000000
1998-01-01	1.6770300000000000
1999-01-01	1.5322600000000000
2000-01-01	1.7711400000000002
2001-01-01	3.2708700000000000
2002-01-01	2.6319300000000000
2003-01-01	2.9580500000000000
2004-01-01	3.3050000000000000
2005-01-01	3.7920500000000000
2006-01-01	3.5796400000000000
2007-01-01	3.3876000000000000
2008-01-01	3.6440400000000000
2009-01-01	3.1564099999999997
2010-01-01	3.3645900000000000
2011-01-01	3.9934300000000005
2012-01-01	3.6393800000000005
2013-01-01	3.1022200000000000
2014-01-01	2.5311400000000000
2015-01-01	2.9312300000000000
2016-01-01	2.9859500000000000