Year Number 2004-01-01 3235 2005-01-01 3275 2006-01-01 3304 2007-01-01 3335 2008-01-01 3358 2009-01-01 3392 2010-01-01 3423 2011-01-01 3190 2012-01-01 3284 2013-01-01 3419 2014-01-01 3533 2015-01-01 3585 2016-01-01 3654