Year	number
2006	136033
2007	160375
2008	161808
2009	152302
2010	163650
2011	166653
2012	159521
2013	158875
2014	165722
2015	171984
2016	199900
2017	210288
2018	222555
2019	240113
2020	237702
2021	278530