Year	Percent
1997-01-01	0.60264800000000
1998-01-01	0.78172500000000
1999-01-01	31.76110000000000
2000-01-01	38.84550000000000
2001-01-01	40.40240000000000
2002-01-01	43.83990000000000
2003-01-01	41.80270000000000
2004-01-01	53.28220000000000
2005-01-01	53.69540000000000
2006-01-01	67.14430000000000
2007-01-01	76.53080000000000
2008-01-01	62.32090000000000
2009-01-01	66.51899999999999
2010-01-01	70.32110000000000
2011-01-01	57.73740000000000
2012-01-01	61.09110000000000
2013-01-01	59.50760000000000
2014-01-01	55.71880000000000
2015-01-01	59.72470000000000
2016-01-01	61.03870000000000