Year	Percent
1996-01-01	28.4548
1997-01-01	40.9970
1998-01-01	74.1033
1999-01-01	47.5451
2000-01-01	46.6524
2001-01-01	51.7687
2002-01-01	35.1136
2003-01-01	32.6190
2004-01-01	35.8506
2005-01-01	36.2503
2006-01-01	33.4222
2007-01-01	49.4063
2008-01-01	31.1961
2009-01-01	39.1560
2010-01-01	36.9396
2011-01-01	37.7433
2012-01-01	38.2083
2013-01-01	36.4365
2014-01-01	32.6042