Year	Percent
1983-01-01	15.7316000000000000
1984-01-01	16.7086000000000000
1985-01-01	15.4842000000000000
1986-01-01	13.3908000000000000
1987-01-01	13.0142000000000000
1988-01-01	7.0613399999999995
1989-01-01	4.8248900000000000
1990-01-01	3.3163800000000000
1991-01-01	1.3592200000000000
1992-01-01	0.9351240000000000
1993-01-01	0.8353270000000000
1994-01-01	1.1889299999999998
1995-01-01	1.4749100000000000
1996-01-01	1.3129400000000000
1997-01-01	5.1139600000000000
1998-01-01	2.8919500000000000
1999-01-01	3.7549400000000000
2000-01-01	2.7246000000000000
2001-01-01	3.0969300000000000
2002-01-01	2.8153200000000003
2003-01-01	2.7654300000000000
2004-01-01	2.4770900000000000
2005-01-01	2.8311500000000000
2006-01-01	2.1975900000000000
2007-01-01	3.0658900000000000
2008-01-01	1.3599600000000000
2009-01-01	1.1835700000000000
2010-01-01	0.8608520000000001
2011-01-01	1.0110000000000000
2012-01-01	1.9503000000000000
2013-01-01	4.6431400000000000
2014-01-01	4.7072199999999995
2015-01-01	6.2506200000000000
2016-01-01	5.8069700000000000