Year	Number
2004-01-01	27.5136
2005-01-01	19.2272
2006-01-01	23.0784
2007-01-01	23.5667
2008-01-01	37.5704
2009-01-01	33.8255
2010-01-01	35.2614
2011-01-01	35.4749
2014-01-01	46.4558
2015-01-01	47.5783
2016-01-01	44.6744