Year	Number
2004-01-01	14346
2005-01-01	16240
2006-01-01	17919
2007-01-01	20444
2008-01-01	15657
2009-01-01	13210
2010-01-01	20038
2011-01-01	32596
2012-01-01	31590
2013-01-01	35269
2014-01-01	38464
2015-01-01	45389
2016-01-01	42480
2017-01-01	43438