Year Number 2004-01-01 35 2005-01-01 280 2006-01-01 1256 2007-01-01 3774 2008-01-01 9720 2009-01-01 23751 2010-01-01 33987 2011-01-01 35637 2012-01-01 44574 2013-01-01 51932 2014-01-01 62383 2015-01-01 65323 2016-01-01 76555