Year	Number
2004-01-01	9.1811
2005-01-01	10.9181
2006-01-01	14.8883
2007-01-01	21.0918
2008-01-01	27.0471
2009-01-01	30.2730
2010-01-01	34.9876
2011-01-01	37.4690
2012-01-01	40.1985
2013-01-01	40.4467
2014-01-01	42.4318
2015-01-01	41.9355
2016-01-01	42.4318