Year	Number
1965	44571
1966	44251
1967	43882
1968	43531
1969	43133
1970	42713
1971	42265
1972	41748
1973	41173
1974	40585
1975	39933
1976	39303
1977	38723
1978	38156
1979	37588
1980	37046
1981	36537
1982	35989
1983	35390
1984	34768
1985	34123
1986	33436
1987	32720
1988	31951
1989	31107
1990	30225
1991	29294
1992	28280
1993	27193
1994	26021
1995	24829
1996	23682
1997	22496
1998	21332
1999	20282
2000	19188
2001	18065
2002	17019
2003	16080
2004	15198
2005	14369
2006	13671
2007	12992
2008	12280
2009	11611
2010	10981
2011	10392
2012	9833
2013	9295
2014	8807
2015	8362
2016	7978
2017	7624
2018	7308
2019	7019
2020	6753
2021	6512
2022	6288