Year	Number
2004-01-01	15.2349
2005-01-01	16.3475
2006-01-01	23.2675
2007-01-01	24.3859
2008-01-01	26.8067
2009-01-01	32.3797
2010-01-01	33.1431
2011-01-01	33.3748
2012-01-01	33.5891
2013-01-01	34.5458
2014-01-01	34.2519
2015-01-01	34.2586
2016-01-01	32.6907