Year	Number
2008-01-01	6433190
2009-01-01	6411017
2010-01-01	6323875
2011-01-01	6012234
2012-01-01	5632352
2013-01-01	5617123
2014-01-01	5012256
2015-01-01	4608685
2016-01-01	4400426