Year Number 2004-01-01 110 2005-01-01 111 2006-01-01 123 2007-01-01 127 2008-01-01 133 2009-01-01 139 2010-01-01 141 2011-01-01 149 2012-01-01 151 2013-01-01 158 2014-01-01 166 2015-01-01 171 2016-01-01 172