Year	Number
1990	13627
1991	12160
1992	14809
1993	13088
1994	13517
1995	13919
1996	14236
1997	14475
1998	14624
1999	14696
2000	14706
2001	14645
2002	14487
2003	14267
2004	13970
2005	13630
2006	13244
2007	12863
2008	12485
2009	12107
2010	11776
2011	11411
2012	11084
2013	10815
2014	10604
2015	10439
2016	10325
2017	10213
2018	10120
2019	10027
2020	9942
2021	9866
2022	9784