Year	Number
2004-01-01	14.0481
2005-01-01	12.6316
2006-01-01	11.7578
2007-01-01	11.4995
2008-01-01	11.3243
2009-01-01	11.1755
2010-01-01	10.9525
2011-01-01	11.2459
2012-01-01	11.0963
2013-01-01	10.8586
2014-01-01	10.6604
2015-01-01	10.5147
2016-01-01	11.4852