Year	Percent
1990-01-01	2.9728900000000000
1991-01-01	1.5923200000000002
1992-01-01	1.4406100000000000
1993-01-01	1.4085600000000000
1994-01-01	1.4863700000000000
1995-01-01	1.4985100000000000
1996-01-01	1.1662500000000000
1997-01-01	1.1992500000000000
1998-01-01	1.2687899999999999
1999-01-01	1.3917000000000000
2000-01-01	1.4097700000000000
2001-01-01	1.5438100000000001
2002-01-01	2.1407900000000000
2003-01-01	1.6126300000000000
2004-01-01	1.6136300000000000
2005-01-01	1.5375700000000000
2006-01-01	1.5755900000000000
2007-01-01	1.5898500000000000
2008-01-01	1.6404800000000000
2009-01-01	1.8667900000000002
2010-01-01	1.8538900000000000
2011-01-01	1.9585800000000000
2012-01-01	2.1802200000000003
2013-01-01	1.9346200000000000
2014-01-01	1.9264500000000000
2015-01-01	2.1468200000000000
2016-01-01	2.1883400000000000