Year	Number
2004-01-01	34.9496
2005-01-01	43.2555
2006-01-01	46.5669
2007-01-01	58.9137
2008-01-01	71.5711
2009-01-01	82.3857
2010-01-01	82.0082
2011-01-01	80.6465
2012-01-01	92.3281
2013-01-01	82.2949
2014-01-01	80.9665
2015-01-01	78.7515
2016-01-01	75.2552