Year	Number
2004-01-01	32535
2005-01-01	19688
2006-01-01	14832
2007-01-01	22663
2008-01-01	21737
2009-01-01	22727
2010-01-01	31936
2011-01-01	34841
2012-01-01	32132
2013-01-01	40467