Year	Number
2004-01-01	6
2005-01-01	4
2007-01-01	599
2008-01-01	619
2009-01-01	583
2010-01-01	626
2011-01-01	642
2012-01-01	647
2013-01-01	635
2014-01-01	638
2015-01-01	646
2016-01-01	655