Year	Number
1990	11080
1991	11226
1992	11324
1993	11386
1994	11416
1995	11427
1996	11353
1997	11176
1998	10907
1999	10567
2000	10230
2001	9952
2002	9816
2003	9747
2004	9674
2005	9715
2006	9952
2007	10464
2008	11207
2009	12090
2010	12880
2011	13271
2012	13003
2013	12527
2014	12264
2015	12314
2016	12658
2017	13303
2018	13998
2019	14524
2020	14827
2021	14841
2022	14559