Year	Number
2004-01-01	13425
2005-01-01	30675
2006-01-01	47630
2007-01-01	98393
2008-01-01	121390
2009-01-01	76498
2010-01-01	90821
2011-01-01	108053
2012-01-01	132623
2013-01-01	181237