Year	Percent
1990-01-01	2.851610000000000
1991-01-01	6.093369999999999
1992-01-01	9.829950000000000
1993-01-01	12.738100000000000
1994-01-01	14.156500000000000
1995-01-01	16.868400000000000
1996-01-01	17.525500000000000
1997-01-01	16.755500000000000
1998-01-01	15.403600000000000
1999-01-01	13.249300000000000
2000-01-01	9.887650000000000
2001-01-01	11.277700000000000
2002-01-01	11.284900000000000
2003-01-01	12.040200000000000
2004-01-01	17.546500000000000
2005-01-01	34.027100000000000
2006-01-01	32.760300000000000
2007-01-01	40.209000000000000
2008-01-01	40.827900000000000
2009-01-01	47.458600000000000
2010-01-01	64.418700000000000
2011-01-01	62.341900000000000
2012-01-01	63.794500000000000
2013-01-01	60.167400000000000
2014-01-01	44.797500000000000
2015-01-01	33.389800000000000
2016-01-01	32.700700000000000
2017-01-01	37.354200000000000