Year	Percent
1983-01-01	0.3978370000000000
1984-01-01	1.6501599999999998
1985-01-01	3.4877199999999995
1986-01-01	4.0565700000000000
1987-01-01	5.4732000000000000
1988-01-01	4.7043500000000000
1989-01-01	2.8506400000000003
1990-01-01	3.3747000000000000
1991-01-01	4.1059400000000000
1992-01-01	4.5646800000000000
1993-01-01	6.6784800000000000
1994-01-01	8.2107000000000000
1995-01-01	8.8744500000000000
1996-01-01	8.9663100000000000
1997-01-01	10.8659000000000000
1998-01-01	10.7555000000000000
1999-01-01	14.6845000000000000
2000-01-01	17.4934000000000000
2001-01-01	16.1002000000000000
2002-01-01	16.2681000000000000
2003-01-01	16.5952000000000000
2004-01-01	16.1434000000000000
2005-01-01	12.6671000000000000
2006-01-01	15.8936000000000000
2007-01-01	16.7060000000000000
2008-01-01	14.1720000000000000
2009-01-01	17.6150000000000000
2010-01-01	20.6718000000000000
2011-01-01	18.1777000000000000
2012-01-01	19.7754000000000000
2013-01-01	20.6446000000000000
2014-01-01	23.3280000000000030
2015-01-01	25.2061000000000000
2016-01-01	23.5041000000000000