Year	Number
2004-01-01	9.5770
2005-01-01	10.9675
2006-01-01	11.5942
2007-01-01	13.2002
2008-01-01	13.2981
2009-01-01	13.2981
2010-01-01	13.6114
2011-01-01	15.8049
2012-01-01	16.0400
2013-01-01	15.9812
2014-01-01	16.0791
2015-01-01	16.3337
2016-01-01	16.1770
2017-01-01	15.6091