Year	Number
2004-01-01	464618
2005-01-01	685588
2006-01-01	1185923
2007-01-01	827251
2008-01-01	803398
2009-01-01	1193749
2010-01-01	1335592
2011-01-01	1629078
2012-01-01	2506124
2013-01-01	3347774