Year	Percent
1996-01-01	28.9588
1997-01-01	23.2743
1998-01-01	25.6807
1999-01-01	32.0975
2000-01-01	26.7995
2001-01-01	33.0880
2002-01-01	31.8455
2003-01-01	36.9596
2004-01-01	26.3348
2005-01-01	23.5693
2006-01-01	27.1448
2007-01-01	25.8803
2008-01-01	22.9592
2009-01-01	39.4754
2010-01-01	27.3420
2011-01-01	20.2074
2012-01-01	32.4721
2013-01-01	28.7769
2014-01-01	28.4577