Year	Number
1990	29369
1991	27835
1992	25987
1993	23993
1994	21888
1995	20183
1996	19028
1997	18168
1998	17316
1999	16578
2000	16052
2001	15380
2002	14620
2003	14055
2004	13638
2005	13232
2006	12866
2007	12583
2008	12418
2009	12158
2010	11808
2011	11446
2012	11061
2013	10719
2014	10532
2015	10442
2016	10358
2017	10199
2018	9896
2019	9583
2020	9282
2021	9062
2022	8886