Year	number
2006	38271
2007	43299
2008	41631
2009	41447
2010	44136
2011	45452
2012	45402
2013	47719
2014	51516
2015	48555
2016	46639
2017	52100
2018	51732
2019	50946
2020	47840
2021	49048
2022	51887