Year	Number
2004-01-01	0.1061
2005-01-01	0.2216
2006-01-01	0.3087
2007-01-01	0.4508
2008-01-01	0.5682
2009-01-01	0.6913
2010-01-01	0.8447
2011-01-01	0.9508
2012-01-01	1.1232
2013-01-01	1.3542
2014-01-01	1.8562
2015-01-01	1.9016