Year	Percent
1996-01-01	25.313700000000000
1997-01-01	30.921800000000000
1998-01-01	35.134100000000000
1999-01-01	21.068100000000000
2000-01-01	24.748300000000000
2001-01-01	45.398000000000000
2002-01-01	42.614000000000000
2003-01-01	41.950900000000000
2004-01-01	42.118700000000000
2005-01-01	39.174200000000000
2006-01-01	39.143000000000000
2007-01-01	40.615500000000000
2008-01-01	41.108999999999995
2009-01-01	38.314000000000000
2010-01-01	37.675100000000000
2011-01-01	34.570000000000000
2012-01-01	31.847200000000000
2013-01-01	30.720800000000000
2014-01-01	31.463400000000000