Year	Number
2004-01-01	17171
2005-01-01	30590
2006-01-01	66803
2007-01-01	133705
2008-01-01	213847
2009-01-01	411808
2010-01-01	671089
2011-01-01	1295738
2012-01-01	1900290
2013-01-01	2833220
2014-01-01	5273381