Year	Percent
1990-01-01	26.5297000000000000
1991-01-01	16.8337000000000000
1992-01-01	15.7527000000000000
1993-01-01	19.3470000000000000
1994-01-01	25.4190000000000000
1995-01-01	25.3711000000000000
1996-01-01	19.6087000000000000
1997-01-01	17.0872000000000000
1998-01-01	19.0096000000000000
1999-01-01	16.0082000000000000
2000-01-01	13.3661000000000000
2001-01-01	13.1379000000000000
2002-01-01	12.1011000000000000
2003-01-01	10.7822000000000000
2004-01-01	9.2449600000000000
2005-01-01	7.6555800000000005
2006-01-01	6.7216200000000000
2007-01-01	6.1021800000000010
2008-01-01	5.2414500000000000
2009-01-01	4.6159500000000000
2010-01-01	4.9374300000000000
2011-01-01	4.2898700000000000
2012-01-01	9.4657500000000000
2013-01-01	8.2704000000000000
2014-01-01	7.7506600000000010
2015-01-01	9.6828300000000010
2016-01-01	18.3959000000000000