Year	Number
2004	402500
2005	443900
2006	504800
2007	551000
2008	565800
2009	454000
2010	501800
2011	578100
2012	588800
2013	607100
2014	595900
2015	613800
2016	620100
2017	650200
2018	741500
2019	734600
2020	694400