Year	Number
1992	30300
1993	31600
1994	32400
1995	32200
1998	31900
1999	32360
2000	32940
2001	32166
2002	30722
2003	27418
2004	26151
2005	23671
2006	22949
2007	22640
2008	23638
2009	23916
2010	23907
2011	23644
2012	23595
2013	23150
2014	22383
2015	22029
2016	22385
2017	22497
2018	22241
2019	22269
2020	22266
2021	22500
2022	22534