Year	Number
1996	66768
1997	67088
1998	63443
1999	55981
2000	58714
2001	57166
2002	57405
2003	57461
2004	57609
2005	57253
2006	56409
2007	54813
2008	51700
2009	46279
2010	44034
2011	42557
2012	40885
2013	39843
2014	39224
2016	38546
2017	38210
2018	38785
2019	39185
2020	40414
2021	41753