Year	Number
2004-01-01	283
2005-01-01	313
2006-01-01	326
2007-01-01	368
2008-01-01	364
2009-01-01	382
2010-01-01	399
2011-01-01	428
2012-01-01	441
2013-01-01	450
2014-01-01	455
2015-01-01	464
2016-01-01	456