Year	Number
2004-01-01	30271
2005-01-01	31575
2006-01-01	32835
2007-01-01	33167
2008-01-01	32478
2009-01-01	34191
2010-01-01	32748
2011-01-01	38319
2012-01-01	39227
2013-01-01	38436
2014-01-01	41973
2015-01-01	41449
2016-01-01	34027