Year	Number
2007-01-01	19357.2165
2008-01-01	23155.8633
2009-01-01	22500.5296
2010-01-01	22369.0400
2011-01-01	22922.9479
2012-01-01	25608.6878
2013-01-01	25989.3236
2014-01-01	22746.7974
2015-01-01	23280.1348
2016-01-01	22843.0669
2017-01-01	22374.9354