Year	Number
2004-01-01	12.6222
2005-01-01	12.6671
2006-01-01	12.7701
2007-01-01	13.0124
2008-01-01	13.1772
2009-01-01	12.9350
2010-01-01	12.8185
2011-01-01	12.4569
2012-01-01	12.0497
2013-01-01	11.5312
2014-01-01	11.3234
2015-01-01	11.2718
2016-01-01	11.0105
2017-01-01	10.7325