Year	Number
1997	13342
2000	12551
2001	12607
2003	11762
2008	10277
2009	11701
2010	11409
2011	10854
2012	10605
2013	10402
2014	10343
2015	10119
2016	9867
2017	9743
2018	9723
2019	9778
2020	9668
2021	9738
2022	9668