Year	Number
1991	4596
1992	4893
1993	6858
1994	8267
1995	9599
1996	10448
1997	11114
1998	11260
1999	11502
2000	11434
2001	10978
2002	9869
2003	9626
2004	9413
2005	9422
2006	9283
2007	9384
2008	9422
2009	9364
2010	9402
2011	9662
2012	9620
2013	9706
2014	9972
2015	9854
2016	9844
2017	9685
2018	11235
2019	6280
2020	6849
2021	7129
2022	7078