Year	Number
2006-01-01	6542
2007-01-01	6651
2008-01-01	6732
2009-01-01	6705
2010-01-01	6757
2011-01-01	6867
2012-01-01	6987
2013-01-01	7039
2014-01-01	7064
2015-01-01	7041
2016-01-01	6928
2017-01-01	6541