Year	Number
2007-01-01	9281.0
2008-01-01	15521.0
2009-01-01	17828.0
2010-01-01	20704.0
2011-01-01	23315.0
2012-01-01	29376.0
2013-01-01	24740.0
2014-01-01	22421.0
2015-01-01	15809.0
2016-01-01	17249.1