Year Number 2004-01-01 3702804 2005-01-01 3787092 2006-01-01 3874592 2007-01-01 4035301 2008-01-01 4195940 2009-01-01 4307220 2010-01-01 4480043 2011-01-01 4270280 2012-01-01 5068199 2013-01-01 5569261 2014-01-01 6289075 2015-01-01 7853865 2016-01-01 9038023