Year	Number
2004	21471
2005	22673
2006	26378
2007	32039
2008	28982
2009	22344
2010	29166
2011	32995
2012	42983
2013	51083
2014	55534
2015	64797
2016	68427
2017	77969
2018	81407
2019	84869
2020	73303