Year	Number
1978	44873
1979	44857
1998	42187
1999	41814
2000	40941
2001	39711
2005	30511
2006	24889
2008	16957
2009	11671
2010	9425
2011	9044
2012	7970
2013	9567
2015	11025
2016	11289
2017	11061
2018	8776
2020	4976
2021	3534
2022	4229