Year	Percent
1997-01-01	7.633589999999999
1998-01-01	7.633589999999999
1999-01-01	7.633589999999999
2000-01-01	28.191999999999997
2001-01-01	28.191999999999997
2002-01-01	28.191999999999997
2003-01-01	28.191999999999997
2004-01-01	28.191999999999997
2005-01-01	10.207400000000000
2006-01-01	10.931700000000000
2007-01-01	14.793700000000000
2008-01-01	8.204170000000000
2009-01-01	8.450350000000000
2010-01-01	6.924410000000001
2011-01-01	2.656270000000000
2012-01-01	14.147700000000000
2013-01-01	6.808830000000000
2014-01-01	7.031619999999999
2015-01-01	14.393700000000000
2016-01-01	8.595970000000000