Year	Number
2004-01-01	10175
2005-01-01	10409
2006-01-01	10485
2007-01-01	10624
2008-01-01	10937
2009-01-01	20241
2010-01-01	21187
2011-01-01	22061
2012-01-01	23574
2013-01-01	25242
2014-01-01	13648
2015-01-01	14453
2016-01-01	15338