Year Number 2006 46912000 2007 50044000 2008 51737000 2009 47481000 2010 53620000 2011 61909000 2012 65175000 2013 65780000 2014 63737000 2015 55971000 2016 52979000 2017 54955000 2018 38069000 2019 37845898.4375