Year	Number
2005-01-01	35
2006-01-01	42
2007-01-01	255
2008-01-01	293
2009-01-01	281
2010-01-01	329
2011-01-01	376
2012-01-01	374
2013-01-01	478
2014-01-01	551
2015-01-01	564
2016-01-01	501
2017-01-01	527