Year	Number
2004-01-01	11.71823096
2005-01-01	13.88471211
2006-01-01	12.59734017
2007-01-01	10.16903652
2008-01-01	13.14828267
2009-01-01	14.55104271
2010-01-01	16.65543135
2011-01-01	18.85176830
2012-01-01	20.37655838
2013-01-01	15.97550394
2014-01-01	16.39657917