Year	Number
2004-01-01	2742
2005-01-01	2774
2006-01-01	2859
2007-01-01	2897
2008-01-01	2991
2009-01-01	3081
2010-01-01	3769
2011-01-01	4016
2012-01-01	4145
2013-01-01	4260
2014-01-01	3798
2015-01-01	3837
2016-01-01	3847
2017-01-01	3650