Year	Number
1990	32912
1991	28716
1992	28294
1993	27922
1994	27854
1995	27568
1996	27763
1997	28096
1998	28600
1999	29241
2000	30070
2001	31108
2002	32234
2003	35368
2004	33965
2005	34764
2006	35718
2007	36066
2008	36332
2009	36084
2010	35356
2011	36666
2012	44964
2013	44551
2014	40601
2015	42899
2016	39171
2017	39687
2018	41889
2019	37151
2020	33981
2021	33576
2022	31896