Year	Percent
1996-01-01	4.0404500000000000
1997-01-01	5.9314200000000000
1998-01-01	6.5066800000000000
1999-01-01	8.8616000000000000
2000-01-01	5.6982099999999996
2001-01-01	3.6063500000000000
2002-01-01	4.7257800000000000
2003-01-01	5.6624600000000000
2004-01-01	6.7088399999999995
2005-01-01	3.9776599999999998
2006-01-01	3.7732099999999997
2007-01-01	3.5546100000000000
2008-01-01	2.9043700000000000
2009-01-01	2.9172599999999997
2010-01-01	2.7574300000000000
2011-01-01	2.4038200000000000
2012-01-01	2.6031800000000000
2013-01-01	2.3591100000000000
2014-01-01	2.3025100000000000
2015-01-01	2.2253100000000000
2016-01-01	2.1041900000000000