Year	Number
2004-01-01	17054
2005-01-01	17108
2006-01-01	18643
2007-01-01	20221
2008-01-01	20758
2009-01-01	20661
2010-01-01	22562
2011-01-01	24673
2012-01-01	25370
2013-01-01	27105
2014-01-01	32658
2015-01-01	21938
2016-01-01	62173