Year	Percent
1997-01-01	0.5308540000000000
1998-01-01	0.5308540000000000
1999-01-01	0.5308540000000000
2000-01-01	0.5308540000000000
2001-01-01	0.5308540000000000
2002-01-01	0.5308540000000000
2003-01-01	15.4500000000000000
2004-01-01	8.1316100000000000
2005-01-01	5.6803400000000000
2006-01-01	4.1354700000000000
2007-01-01	3.8021300000000005
2008-01-01	3.3401800000000000
2009-01-01	4.3147699999999990
2010-01-01	4.2256900000000000
2011-01-01	4.7833200000000000
2012-01-01	4.7932000000000000
2013-01-01	4.8031700000000000
2014-01-01	4.3906500000000000
2015-01-01	4.3379000000000000
2016-01-01	4.3142000000000000