Year	Number
1990	32441
1991	30443
1992	28567
1993	26557
1994	24758
1995	22747
1996	21407
1997	20109
1998	18807
1999	17757
2000	17083
2001	16138
2002	15486
2003	15024
2004	14611
2005	14116
2006	13653
2007	13217
2008	13117
2009	12642
2010	12204
2011	11553
2012	11221
2013	10770
2014	10713
2015	10486
2016	10411
2017	10161
2018	9800
2019	9448
2020	9150
2021	8997
2022	8812