Year	Percent
1996-01-01	52.8956
1997-01-01	50.8502
1998-01-01	55.0062
1999-01-01	56.4911
2000-01-01	59.1512
2001-01-01	72.7920
2002-01-01	112.2700
2003-01-01	36.3393
2004-01-01	53.3128
2005-01-01	49.2991
2006-01-01	41.1732
2007-01-01	44.5309
2008-01-01	67.9776
2009-01-01	77.5346
2010-01-01	88.0071
2011-01-01	80.2584
2012-01-01	73.9153
2013-01-01	72.2569
2014-01-01	69.7665