Year	Number
2009-01-01	17.7646
2010-01-01	18.4013
2011-01-01	20.0696
2012-01-01	27.3306
2013-01-01	37.4412
2014-01-01	37.2882
2015-01-01	32.9882
2016-01-01	24.4350