Year	Number
1975	542
1977	575
1982	841
1983	1195
1986	1005
1991	3135
1992	3272
1994	945
1996	685
1997	998
2013	942
2014	1653
2015	2181
2016	2108
2017	2357
2018	2257
2019	1706
2020	2337
2021	2422