Year Number 2004-01-01 21 2005-01-01 75 2006-01-01 81 2007-01-01 88 2008-01-01 67 2009-01-01 69 2010-01-01 80 2011-01-01 131 2012-01-01 45 2013-01-01 53 2014-01-01 56 2015-01-01 151 2016-01-01 156