Year	Number
2004-01-01	836
2005-01-01	835
2006-01-01	827
2007-01-01	819
2008-01-01	815
2009-01-01	804
2010-01-01	796
2011-01-01	778
2012-01-01	764
2013-01-01	747
2014-01-01	722
2015-01-01	697
2016-01-01	631
2017-01-01	589