Year	Number
1990	22014
1991	21999
1992	21943
1993	21932
1994	22008
1995	22152
1996	22360
1997	22637
1998	22975
1999	23359
2000	23788
2001	24173
2002	24470
2003	24717
2004	34902
2005	24802
2006	24629
2007	24363
2008	24112
2009	23835
2010	23602
2011	23516
2012	23471
2013	23313
2014	23161
2015	23116
2016	23102
2017	23120
2018	23094
2019	23061
2020	22893
2021	22682
2022	22491