Year Number 2006 2201 2007 6367 2008 11135 2009 13748 2010 17323 2011 28374 2012 29438 2013 28852 2014 36985 2015 42570 2016 46599 2017 61641 2018 70142 2019 69975 2020 70000 2021 65495 2022 60148