Year	Number
1990	70980
1991	67995
1992	64972
1993	61167
1994	57710
1995	54331
1996	52238
1997	50265
1998	48411
1999	46550
2000	45697
2001	44197
2002	43351
2003	42814
2004	41989
2005	40966
2006	40906
2007	40571
2008	39860
2009	38319
2010	36952
2011	36029
2012	35555
2013	34585
2014	34080
2015	33377
2016	32577
2017	31378
2018	30411
2019	29480
2020	28244
2021	27375
2022	26209