Year	Number
1990	31416
1991	30133
1992	28939
1993	27862
1994	26895
1995	26025
1996	25218
1997	24438
1998	27525
1999	22942
2000	22217
2001	21659
2002	20872
2003	20265
2004	20241
2005	19488
2006	18662
2007	18116
2008	17529
2009	16940
2010	26011
2011	15606
2012	15005
2013	14455
2014	13955
2015	13504
2016	13161
2017	12751
2018	12401
2019	12084
2020	11812
2021	11834
2022	11362