Year	Number
2004	4707
2005	3965
2006	3905
2007	4739
2008	5824
2009	4316
2010	5493
2011	4822
2012	4388
2013	4263
2014	4566
2015	4062
2016	4334
2017	4348
2018	3307
2019	5779
2020	4807
2021	3351