Year	Number
2004-01-01	45218
2005-01-01	47964
2006-01-01	47319
2007-01-01	50249
2008-01-01	53420
2009-01-01	88007
2010-01-01	111005
2011-01-01	134768
2012-01-01	181075
2013-01-01	210148