Year	Number
2004	33467
2005	33609
2006	35219
2007	34200
2008	30278
2009	25541
2010	30447
2011	29466
2012	29563
2013	30632
2014	17644
2015	19211
2016	19301
2017	20031
2018	19065
2019	20256
2020	21458
2021	22855