Year	Percent
1996-01-01	29.965999999999998
1997-01-01	9.434710000000000
1998-01-01	18.391600000000000
1999-01-01	50.103100000000000
2000-01-01	33.690200000000000
2001-01-01	33.188200000000000
2002-01-01	31.318700000000000
2003-01-01	36.303700000000000
2004-01-01	26.979700000000000
2005-01-01	26.073800000000000
2006-01-01	37.149100000000000
2007-01-01	44.789700000000000
2008-01-01	36.116700000000000
2009-01-01	33.205100000000000
2010-01-01	25.408400000000000
2011-01-01	25.816800000000000
2012-01-01	30.260700000000000
2013-01-01	42.484200000000000
2014-01-01	37.636200000000000
2015-01-01	22.324700000000000
2016-01-01	19.599500000000000