Year	Number
2004-01-01	0.4922
2005-01-01	0.6563
2006-01-01	0.6563
2007-01-01	1.1485
2008-01-01	2.2149
2009-01-01	2.7892
2010-01-01	3.3634
2011-01-01	3.5275
2012-01-01	4.3478
2013-01-01	4.6760
2014-01-01	4.6760
2015-01-01	5.4963