Year	Number
2009-01-01	7779409
2010-01-01	7745353
2011-01-01	7579201
2012-01-01	7234023
2013-01-01	6885969
2014-01-01	6709168
2015-01-01	6604836
2016-01-01	6417728
2017-01-01	6800206