Year	Number
1990	16696
1991	17047
1992	17880
1993	18099
1994	17791
1995	17842
1996	17792
1997	17716
1998	17542
1999	18701
2000	16797
2001	16086
2002	15128
2003	14077
2004	13083
2005	12185
2006	11362
2007	10639
2008	9993
2009	9390
2010	8819
2011	8320
2012	7898
2013	7552
2014	7294
2015	7105
2016	6947
2017	6850
2018	6802
2019	6783
2020	6794
2021	6780
2022	7125