Year	Number
2004-01-01	12850
2005-01-01	11301
2006-01-01	8585
2007-01-01	7852
2008-01-01	6400
2009-01-01	10271
2010-01-01	12229
2011-01-01	12992
2012-01-01	14879
2013-01-01	11067
2014-01-01	14180