Year	Percent
1989-01-01	13.1208000000000000
1990-01-01	13.1195000000000000
1991-01-01	13.1968000000000000
1992-01-01	13.2321000000000000
1993-01-01	13.2173000000000000
1994-01-01	13.2233000000000000
1995-01-01	13.2016000000000000
1996-01-01	9.1203300000000010
1997-01-01	6.7324500000000000
1998-01-01	5.5098600000000000
1999-01-01	1.8673000000000000
2000-01-01	0.8567350000000000
2001-01-01	0.9884850000000001
2002-01-01	1.2671900000000000
2003-01-01	1.2128100000000000
2004-01-01	1.8804700000000000
2005-01-01	1.6391000000000000
2006-01-01	1.6615000000000000
2007-01-01	1.5930300000000000
2008-01-01	1.5003900000000000
2009-01-01	1.7019300000000000
2010-01-01	2.5218599999999998
2011-01-01	2.3037900000000002
2012-01-01	2.1906800000000000
2013-01-01	2.4775000000000000
2014-01-01	2.2326099999999998
2015-01-01	2.0647100000000000
2016-01-01	1.5562600000000000
2017-01-01	1.8819099999999997