Year	Number
1990	62751
1991	58822
1992	54869
1993	50873
1994	46855
1995	42990
1996	39761
1997	37294
1998	35065
1999	33104
2000	31632
2001	30199
2002	28799
2003	27758
2004	26881
2005	26008
2006	25132
2007	24326
2008	23815
2009	23232
2010	22340
2011	21273
2012	20309
2013	19483
2014	18884
2015	18486
2016	18112
2017	17735
2018	17145
2019	16469
2020	15848
2021	15418
2022	15113