Year	Number
1960	66160
1961	65720
1962	65122
1963	64338
1964	63451
1965	62238
1966	60696
1967	58976
1968	57036
1969	54895
1970	52719
1971	50649
1972	48624
1973	46724
1974	45020
1975	43485
1976	42080
1977	40723
1978	39366
1979	38050
1980	36611
1981	35133
1982	33715
1983	32288
1984	30950
1985	31474
1986	28752
1987	27885
1988	27119
1989	26467
1990	25893
1991	25313
1992	24656
1993	23930
1994	23150
1995	22327
1996	21481
1997	20628
1998	19826
1999	19092
2000	18389
2001	17706
2002	17030
2003	16357
2004	15680
2005	14996
2006	14318
2007	13671
2008	13062
2009	12483
2010	11958
2011	11488
2012	11057
2013	10641
2014	10248
2015	9871
2016	9495
2017	9150
2018	8835
2019	8602
2020	8358
2021	8057
2022	7722