Year	Number
2004-01-01	0.4314
2005-01-01	0.4314
2006-01-01	0.5177
2007-01-01	0.5177
2008-01-01	0.6903
2009-01-01	0.8197
2010-01-01	1.0354
2011-01-01	1.2079
2012-01-01	1.2942
2013-01-01	1.2511
2014-01-01	1.4236
2015-01-01	1.6393
2016-01-01	1.6393