Year	Number
2004-01-01	5407
2005-01-01	7297
2006-01-01	11947
2007-01-01	12324
2008-01-01	12630
2009-01-01	11788
2010-01-01	13158
2011-01-01	14204
2012-01-01	13523
2013-01-01	12710
2014-01-01	12885
2015-01-01	11398
2016-01-01	10902