Year	Number
2004-01-01	9471
2005-01-01	21758
2006-01-01	28892
2007-01-01	36069
2008-01-01	39473
2009-01-01	41043
2010-01-01	43552
2011-01-01	35312
2012-01-01	32496
2013-01-01	34121
2014-01-01	34609
2015-01-01	35696
2016-01-01	44639