Year	Percent
1992-01-01	1.3901600000000000
1993-01-01	1.6366300000000000
1994-01-01	2.6278500000000000
1995-01-01	4.0862300000000005
1996-01-01	7.7693900000000000
1997-01-01	20.1336000000000000
1998-01-01	28.6058000000000000
1999-01-01	30.0419000000000000
2000-01-01	27.7542000000000000
2001-01-01	21.1832000000000000
2002-01-01	18.9772000000000000
2003-01-01	18.6312000000000000
2004-01-01	22.8988000000000000
2005-01-01	27.5192000000000000
2006-01-01	31.4704000000000000
2007-01-01	34.0779000000000000
2008-01-01	21.9580000000000020
2009-01-01	17.6019000000000000
2010-01-01	21.9939000000000000
2011-01-01	17.0247000000000000
2012-01-01	14.8903000000000000
2013-01-01	15.1631000000000000
2014-01-01	12.0627000000000000
2015-01-01	12.1948000000000000
2016-01-01	15.8959000000000000
2017-01-01	19.6682000000000000