Year	Percent
1990-01-01	1.3240299999999998
1991-01-01	1.4696100000000000
1992-01-01	1.6139000000000000
1993-01-01	1.7254200000000002
1994-01-01	1.8914900000000001
1995-01-01	2.0496100000000000
1996-01-01	2.0728200000000000
1997-01-01	2.1142300000000000
1998-01-01	2.2030500000000000
1999-01-01	2.2806500000000000
2000-01-01	2.5277500000000000
2001-01-01	3.4079099999999998
2002-01-01	2.9145300000000000
2003-01-01	3.1488300000000000
2004-01-01	3.3803400000000003
2005-01-01	2.8459100000000000
2006-01-01	3.0800600000000000
2007-01-01	2.9855500000000000
2008-01-01	2.9437700000000000
2009-01-01	3.0636300000000000
2010-01-01	2.9684100000000000
2011-01-01	2.7656200000000000
2012-01-01	2.7922100000000000
2013-01-01	2.8365500000000000
2014-01-01	2.8209600000000000
2015-01-01	2.8452800000000000
2016-01-01	2.8364100000000000