Year	Percent
1993-01-01	4.9323100000000000
1994-01-01	6.3796800000000005
1995-01-01	8.3051700000000000
1996-01-01	10.6185000000000000
1997-01-01	16.1689000000000000
1998-01-01	25.8534000000000000
1999-01-01	30.0752000000000000
2000-01-01	25.5774000000000000
2001-01-01	21.6251000000000000
2002-01-01	22.0047000000000000
2003-01-01	23.1229000000000000
2004-01-01	24.6707000000000000
2005-01-01	31.1216000000000000
2006-01-01	36.1467000000000000
2007-01-01	33.7209000000000000
2008-01-01	28.9749000000000000
2009-01-01	27.3190000000000030
2010-01-01	27.3625000000000000
2011-01-01	27.4951000000000000
2012-01-01	28.9026000000000000
2013-01-01	27.7144000000000000
2014-01-01	26.6015000000000000
2015-01-01	24.8922000000000000
2016-01-01	23.1824000000000000
2017-01-01	23.1529000000000000