Year	Percent
1995-01-01	3.9108099999999997
1996-01-01	8.0722700000000000
1997-01-01	14.3707000000000000
1998-01-01	14.0803000000000000
1999-01-01	11.0686000000000000
2000-01-01	11.3152000000000000
2001-01-01	12.6348000000000000
2002-01-01	21.2174000000000000
2003-01-01	22.6664000000000000
2004-01-01	21.3085000000000000
2005-01-01	26.4794000000000000
2006-01-01	41.8617000000000000
2007-01-01	83.4391000000000000
2008-01-01	74.8202000000000000
2009-01-01	41.9520000000000000
2010-01-01	42.9289000000000000
2011-01-01	39.4983000000000000
2012-01-01	36.9559000000000000
2013-01-01	37.1196000000000000
2014-01-01	36.0182000000000000
2015-01-01	35.7858000000000000
2016-01-01	37.5638000000000000
2017-01-01	39.6419000000000000