Year	Number
1992	39494
1993	28503
1994	21250
1995	17551
1996	18014
1997	15106
1998	16454
1999	19900
2000	23377
2001	24777
2002	23712
2003	24969
2004	22985
2005	23644
2006	27884
2007	27505
2008	27712
2009	25598
2010	28722
2011	26495
2012	28701
2013	28765
2014	24072
2015	29269
2016	26795
2017	22777
2018	24926
2019	23337
2020	23759
2021	19569