Year	Number
2008-01-01	5424159
2009-01-01	5500402
2010-01-01	5441823
2011-01-01	5487410
2012-01-01	5798051
2013-01-01	5876418
2014-01-01	6023603
2015-01-01	6214882
2016-01-01	6161212