Year	Number
2004-01-01	11801
2005-01-01	24021
2006-01-01	31048
2007-01-01	38118
2008-01-01	41440
2009-01-01	41301
2010-01-01	43807
2011-01-01	35651
2012-01-01	32855
2013-01-01	34610
2014-01-01	35071
2015-01-01	36188
2016-01-01	45163