Year	Number
2004-01-01	5657
2005-01-01	6255
2006-01-01	6690
2007-01-01	7323
2008-01-01	7706
2009-01-01	7963
2010-01-01	8089
2011-01-01	8098
2012-01-01	8448
2013-01-01	8549
2014-01-01	9314
2015-01-01	9659