Year	Number
2004-01-01	7.7328
2005-01-01	9.2248
2006-01-01	11.7683
2007-01-01	12.4834
2008-01-01	11.6976
2009-01-01	14.3203
2010-01-01	12.6124
2011-01-01	16.1422
2012-01-01	15.1381
2013-01-01	15.4537
2014-01-01	16.3774
2015-01-01	18.2839
2016-01-01	24.5712
2017-01-01	25.4457