Year	Percent
1990-01-01	6.740800000000000
1991-01-01	4.869210000000000
1992-01-01	5.265030000000000
1993-01-01	6.543870000000000
1994-01-01	7.791480000000000
1995-01-01	8.310330000000000
1996-01-01	7.520020000000000
1997-01-01	7.396180000000000
1998-01-01	8.097680000000000
1999-01-01	9.600800000000000
2000-01-01	10.888900000000000
2001-01-01	10.741600000000000
2002-01-01	13.164400000000000
2003-01-01	20.756999999999998
2004-01-01	22.830100000000000
2005-01-01	25.149100000000000
2006-01-01	26.730400000000000
2007-01-01	23.508400000000000
2008-01-01	18.086300000000000
2009-01-01	20.073500000000000
2010-01-01	15.925900000000000
2011-01-01	13.247000000000000
2012-01-01	11.409800000000000
2013-01-01	10.135400000000000
2014-01-01	11.928400000000000
2015-01-01	13.072600000000000
2016-01-01	16.404400000000000