Year	Percent
1997-01-01	0.115513000000000
1998-01-01	0.097237000000000
1999-01-01	20.945600000000000
2000-01-01	23.164700000000000
2001-01-01	25.460900000000000
2002-01-01	28.130000000000000
2003-01-01	30.535300000000000
2004-01-01	34.100700000000000
2005-01-01	37.133900000000000
2006-01-01	44.027500000000000
2007-01-01	44.836000000000006
2008-01-01	41.331600000000000
2009-01-01	37.892100000000000
2010-01-01	36.668500000000000
2011-01-01	39.473700000000000
2012-01-01	35.806900000000000
2013-01-01	35.449400000000000
2014-01-01	34.571800000000000
2015-01-01	31.725100000000000
2016-01-01	31.672200000000000