Year	Number
2006	4362000
2007	3627000
2008	3847000
2009	3639000
2010	4311000
2011	4020000
2012	4108000
2013	4228000
2014	4292000
2015	3981000
2016	4143000
2017	4294000
2018	4702000
2019	4881000
2020	1643000