Year	Number
2004	40390
2005	43741
2006	47227
2007	52691
2008	52662
2009	44965
2010	46280
2011	48969
2012	47547
2013	48281
2014	47670
2015	49453
2016	52692
2017	52490
2018	54566
2019	55588
2020	56031
2021	70091