Year	Number
1990	23577
1991	23156
1992	22787
1993	22197
1994	21568
1995	21039
1996	20474
1997	19961
1998	19451
1999	19019
2000	18640
2001	18242
2002	17858
2003	17457
2004	17079
2005	16664
2006	15892
2007	15339
2008	14922
2009	14398
2010	13614
2011	12835
2012	12297
2013	11890
2014	11587
2015	11160
2016	10762
2017	10509
2018	10109
2019	9824
2020	9496
2021	9147
2022	8856