Year	Number
2004-01-01	35346
2005-01-01	34183
2006-01-01	47343
2007-01-01	53596
2008-01-01	53926
2009-01-01	54661
2010-01-01	52633
2011-01-01	180115
2012-01-01	255110
2013-01-01	360489
2014-01-01	346809
2015-01-01	326232
2016-01-01	422960