Year	Number
2004-01-01	13902
2005-01-01	13694
2006-01-01	12880
2007-01-01	12976
2008-01-01	12911
2009-01-01	12708.6396
2010-01-01	12458.3747
2011-01-01	12220
2012-01-01	11287
2013-01-01	12984