Year	Number
2008-01-01	13097740
2009-01-01	13466279
2010-01-01	13620635
2011-01-01	15261640
2012-01-01	14629080
2013-01-01	14443777
2014-01-01	14656896
2015-01-01	14537738
2016-01-01	14493561