Year	number
2006	26471
2007	28950
2008	25624
2009	16595
2010	18056
2011	17880
2012	16961
2013	16884
2014	25958
2015	30378
2016	33765
2017	36485
2018	37196
2019	33110
2020	29502
2021	32963
2022	27333