Year	Number
2004-01-01	0.3070
2005-01-01	0.3370
2006-01-01	0.4094
2007-01-01	0.7040
2008-01-01	0.6529
2009-01-01	0.6388
2010-01-01	0.6899
2011-01-01	0.6476
2012-01-01	0.6458
2013-01-01	0.6882
2014-01-01	0.7270
2015-01-01	0.8276
2016-01-01	0.8399