Year	Percent
1992-01-01	6.0611300000000000
1993-01-01	5.9525300000000000
1994-01-01	6.0098199999999995
1995-01-01	6.1551599999999995
1996-01-01	6.3230900000000005
1997-01-01	7.6716700000000000
1998-01-01	8.8157000000000000
1999-01-01	10.9509999999999990
2000-01-01	13.3220000000000010
2001-01-01	18.2222000000000000
2002-01-01	27.5577000000000000
2003-01-01	35.4872000000000000
2004-01-01	34.3347000000000000
2005-01-01	31.7969999999999970
2006-01-01	41.6902000000000000
2007-01-01	39.9731000000000000
2008-01-01	26.7493000000000000
2009-01-01	28.3650000000000000
2010-01-01	22.1164000000000000
2011-01-01	20.1452000000000000
2012-01-01	19.0933000000000000
2013-01-01	19.5150000000000000
2014-01-01	21.7933000000000000
2015-01-01	27.7031000000000000
2016-01-01	30.2064000000000000