Year	Number
2005-01-01	16.6406
2006-01-01	17.2461
2007-01-01	19.4727
2008-01-01	20.7813
2009-01-01	19.7656
2010-01-01	19.2188
2011-01-01	19.5508
2012-01-01	19.1602
2013-01-01	19.4336
2014-01-01	19.8047
2015-01-01	17.9688
2016-01-01	17.0508
2017-01-01	16.6602