Year	Percent
1982-01-01	4.3089900000000005
1983-01-01	5.0941700000000000
1984-01-01	5.1020699999999990
1985-01-01	4.8721500000000000
1986-01-01	5.5384800000000000
1987-01-01	5.6746000000000000
1988-01-01	6.1468400000000000
1989-01-01	6.7424300000000010
1990-01-01	6.6051199999999990
1991-01-01	5.8286100000000000
1992-01-01	5.5552000000000000
1993-01-01	5.4149600000000000
1994-01-01	5.6120800000000010
1995-01-01	5.2168600000000000
1996-01-01	5.8587400000000000
1997-01-01	5.6331100000000000
1998-01-01	5.3707600000000000
1999-01-01	5.0145000000000000
2000-01-01	5.3441100000000000
2001-01-01	10.3979000000000000
2002-01-01	15.8596000000000000
2003-01-01	16.2486000000000000
2004-01-01	16.0393000000000000
2005-01-01	15.6662000000000000
2006-01-01	17.2221000000000000
2007-01-01	19.4633000000000000
2008-01-01	22.1258000000000000
2009-01-01	22.9325000000000000
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