Year	Percent
1991-01-01	40.9687000000000000
1992-01-01	41.9047000000000000
1993-01-01	60.8797000000000000
1994-01-01	54.4941000000000000
1995-01-01	25.6937000000000000
1996-01-01	38.8985000000000000
1997-01-01	12.8242000000000000
1998-01-01	6.7125600000000010
1999-01-01	4.9718500000000000
2000-01-01	3.9353000000000000
2001-01-01	4.4798400000000000
2002-01-01	5.7918100000000000
2003-01-01	5.6412900000000010
2004-01-01	5.4781800000000000
2005-01-01	5.8720099999999995
2006-01-01	5.4625100000000000
2007-01-01	5.1842200000000000
2008-01-01	4.3678800000000000
2009-01-01	4.2045900000000005
2010-01-01	5.2055400000000000
2011-01-01	5.6848700000000000
2012-01-01	6.8341600000000010
2013-01-01	7.4330700000000000
2014-01-01	10.2182000000000000
2015-01-01	10.7123000000000000
2016-01-01	11.9253000000000000