Year	Number
2004	4436000
2005	4481000
2006	4533000
2007	4928000
2008	5425000
2009	5793000
2010	6083000
2011	7676000
2012	8295000
2013	9844000
2014	10022000
2015	13159000
2016	18645000
2017	21583000
2018	18411000
2019	15352000