Year	Number
2005-01-01	6235
2006-01-01	6667
2007-01-01	7214
2008-01-01	7578
2009-01-01	7573
2010-01-01	7426
2011-01-01	7055
2012-01-01	6858
2013-01-01	5810
2014-01-01	5526
2015-01-01	5425
2016-01-01	5471
2017-01-01	5680