Year	Number
1990	48025
1991	46882
1992	47500
1993	46282
1994	43853
1995	42551
1996	41186
1997	39925
1998	38707
1999	37519
2000	36355
2001	35265
2002	34266
2003	33347
2004	32504
2005	31765
2006	30996
2007	29955
2008	28477
2009	26696
2010	24930
2011	23865
2012	22213
2013	21447
2014	21173
2015	20897
2016	20832
2017	20832
2018	20941
2019	21298
2020	22108
2021	23479
2022	27286