Year	Number
2006-01-01	45396
2007-01-01	47252
2008-01-01	34149
2009-01-01	32785
2010-01-01	32180
2011-01-01	42702
2012-01-01	42929
2013-01-01	43674
2014-01-01	34097
2015-01-01	34077
2016-01-01	31752
2017-01-01	31475