Year	Number
2004-01-01	2294
2005-01-01	3075
2006-01-01	3368
2007-01-01	6318
2008-01-01	8711
2009-01-01	13999
2010-01-01	28326
2011-01-01	23489
2012-01-01	28478
2013-01-01	42748
2014-01-01	59067
2015-01-01	68837
2016-01-01	68856
2017-01-01	59018