Year	Percent
1991-01-01	11.1709000000000000
1992-01-01	9.2190600000000000
1993-01-01	4.8524199999999995
1994-01-01	5.9957699999999990
1995-01-01	5.0670800000000010
1996-01-01	6.6798899999999990
1997-01-01	5.1651099999999990
1998-01-01	5.6146000000000000
1999-01-01	6.2232400000000005
2000-01-01	5.8503300000000005
2001-01-01	7.0308600000000006
2002-01-01	10.1912000000000000
2003-01-01	15.8684000000000000
2004-01-01	19.3659000000000000
2005-01-01	21.4120000000000000
2006-01-01	21.7983000000000000
2007-01-01	25.7474000000000000
2008-01-01	26.5246000000000000
2009-01-01	31.3409999999999980
2010-01-01	31.3085000000000000
2011-01-01	34.1098000000000000
2012-01-01	39.8714000000000000
2013-01-01	48.5215000000000000
2014-01-01	55.0831000000000000
2015-01-01	54.6631000000000000
2016-01-01	52.9421000000000000