Year	Number
2004-01-01	0.3017
2005-01-01	0.3691
2006-01-01	0.3793
2007-01-01	0.4413
2008-01-01	0.4307
2009-01-01	0.4202
2010-01-01	0.4753
2011-01-01	0.4961
2012-01-01	0.5308
2013-01-01	0.8980
2014-01-01	0.9486
2015-01-01	0.8941
2016-01-01	1.9911