Year	Number
2004-01-01	12889
2005-01-01	12990
2006-01-01	14796
2007-01-01	14685
2008-01-01	14026
2009-01-01	14251
2010-01-01	14458
2011-01-01	12834
2012-01-01	12663
2013-01-01	18216
2014-01-01	16176
2015-01-01	17566
2016-01-01	32916