Year	Number
1990	25203
1991	24617
1992	24041
1993	23502
1994	22949
1995	22571
1996	21815
1997	21269
1998	20765
1999	21770
2000	19894
2001	19491
2002	19097
2003	18677
2004	18205
2005	17691
2006	17135
2007	16569
2008	16003
2009	15426
2010	14879
2011	14887
2012	13893
2013	13449
2014	13099
2015	12806
2016	12606
2017	12527
2018	12527
2019	12560
2020	12626
2021	12683
2022	12708