Year	Number
2004-01-01	5454
2005-01-01	5503
2006-01-01	5438
2007-01-01	5204
2008-01-01	4802
2009-01-01	5136
2010-01-01	6251
2011-01-01	6269
2012-01-01	6537
2013-01-01	6626
2014-01-01	7109
2015-01-01	7448
2016-01-01	7709