Year	Number
1983	40796
1984	41797
1985	42479
1986	42875
1987	43525
1988	44254
1989	44599
1990	44987
1991	45757
1992	46366
1993	47255
1994	48049
1995	47804
1996	46504
1997	44675
1998	42138
1999	39274
2000	35966
2001	32115
2002	28598
2003	25605
2004	23199
2005	21319
2006	19807
2007	18564
2008	17347
2009	16046
2010	14834
2011	13718
2012	12812
2013	12090
2014	11449
2015	10862
2016	10297
2017	9773
2018	9245
2019	8779
2020	8351
2021	7946
2022	7582