Year	Number
2004-01-01	23722
2005-01-01	28995
2006-01-01	27930
2007-01-01	24705
2008-01-01	32028
2009-01-01	36226
2010-01-01	36771
2011-01-01	43409
2012-01-01	47741
2013-01-01	54210
2014-01-01	45532
2015-01-01	45532