Year	Percent
1999-01-01	0.34185000000000000
2000-01-01	0.36221700000000000
2001-01-01	0.33263400000000004
2002-01-01	0.30850600000000000
2003-01-01	0.25731800000000000
2004-01-01	0.27082399999999995
2005-01-01	0.37642100000000000
2006-01-01	2.67230000000000000
2007-01-01	3.24159000000000000
2008-01-01	3.13868000000000000
2009-01-01	3.67231000000000000
2010-01-01	3.47836000000000000
2011-01-01	2.77804000000000030
2012-01-01	3.34807000000000000
2013-01-01	0.65838100000000000
2014-01-01	2.29735000000000000
2015-01-01	2.51075000000000000
2016-01-01	0.28039500000000000