Year	Number
2004-01-01	25.2182
2005-01-01	25.7106
2006-01-01	26.3022
2007-01-01	25.9607
2008-01-01	27.7844
2009-01-01	26.4573
2010-01-01	26.2890
2011-01-01	25.9716
2012-01-01	26.6312
2013-01-01	26.9015
2014-01-01	27.9934
2015-01-01	28.2708
2016-01-01	28.2720
2017-01-01	26.9454