Year	Percent
1982-01-01	4.0748300000000000
1983-01-01	4.7949500000000000
1984-01-01	4.6566800000000010
1985-01-01	4.3196600000000000
1986-01-01	4.9226900000000000
1987-01-01	5.0207500000000000
1988-01-01	5.5464800000000000
1989-01-01	6.2274199999999995
1990-01-01	6.1027400000000000
1991-01-01	5.2608300000000000
1992-01-01	4.9310100000000000
1993-01-01	4.8144200000000000
1994-01-01	5.1117599999999990
1995-01-01	4.8281800000000010
1996-01-01	5.0739600000000000
1997-01-01	4.8500000000000000
1998-01-01	4.6000700000000000
1999-01-01	4.2672800000000000
2000-01-01	4.6053700000000000
2001-01-01	9.6601600000000010
2002-01-01	15.0937000000000000
2003-01-01	15.4323000000000000
2004-01-01	14.9740000000000000
2005-01-01	14.4613000000000000
2006-01-01	15.8809999999999980
2007-01-01	17.4368000000000000
2008-01-01	18.5881000000000000
2009-01-01	20.6753000000000000
2010-01-01	22.9583000000000000
2011-01-01	23.8780000000000000
2012-01-01	26.6971000000000000
2013-01-01	26.6770000000000000
2014-01-01	29.7796000000000000
2015-01-01	30.4873000000000000
2016-01-01	34.6921000000000000