Year	Number
2004-01-01	7078
2005-01-01	10382
2006-01-01	15250
2007-01-01	11392
2008-01-01	44599
2009-01-01	29708
2010-01-01	21727
2011-01-01	36326
2012-01-01	30098
2013-01-01	32202
2014-01-01	46187
2015-01-01	45440
2016-01-01	54030