Year	Number
2004-01-01	27.0421
2005-01-01	29.0123
2006-01-01	36.9117
2007-01-01	44.0024
2008-01-01	49.8749
2009-01-01	53.6848
2010-01-01	56.5265
2011-01-01	58.5423
2012-01-01	60.6726
2013-01-01	63.6963
2014-01-01	68.6484
2015-01-01	73.7515
2016-01-01	74.4239