Year	Number
1992	33836
1993	34269
1994	34679
1995	35957
1996	36185
1997	36932
2000	37654
2001	37654
2002	42594
2004	42030
2005	42763
2006	42303
2007	41681
2008	41142
2009	40048
2010	38800
2011	37981
2012	36649
2013	36330
2014	34339
2015	33365
2016	32633
2017	31075
2018	29860
2019	28893
2020	27956
2021	27463