Year	Number
2004-01-01	0.3159
2005-01-01	0.3451
2006-01-01	0.3622
2007-01-01	0.3779
2008-01-01	0.4021
2009-01-01	0.5442
2010-01-01	0.7686
2011-01-01	2.0188
2012-01-01	3.3538
2013-01-01	1.2745
2014-01-01	1.5141
2015-01-01	1.8946
2016-01-01	4.9814