Year	Percent
1995-01-01	63.7831679344042
1996-01-01	63.6540224994176
1997-01-01	63.0453661866054
1998-01-01	61.2762522714320
1999-01-01	60.6414482213665
2000-01-01	58.6435399654952
2001-01-01	58.3067390040139
2002-01-01	56.1530226156779
2003-01-01	51.9745930186302
2004-01-01	51.0689131491202
2005-01-01	50.5854444174502
2006-01-01	48.7482953647050
2007-01-01	46.7228035083945
2008-01-01	45.7218125294790
2009-01-01	43.9799906397027
2010-01-01	43.5395643071551
2011-01-01	42.9071386331954
2012-01-01	41.7778822549529
2013-01-01	40.5453070805658
2014-01-01	40.7833452177254
2015-01-01	41.0113931947006
2016-01-01	39.6805236190211
2017-01-01	38.9458129443328