Year	Number
2009-01-01	3289908
2010-01-01	3312235
2011-01-01	3301106
2012-01-01	3206480
2013-01-01	3146766
2014-01-01	3120660
2015-01-01	3110881
2016-01-01	3072264
2017-01-01	3228818