Year	Number
1960	102
1961	98
1962	95
1963	96
1964	94
1965	91
1966	87
1967	82
1968	75
1969	71
1970	67
1971	64
1972	65
1973	64
1974	60
1975	56
1976	53
1977	49
1978	45
1979	44
1980	43
1981	40
1982	38
1983	36
1984	34
1985	31
1986	29
1987	28
1988	29
1989	29
1990	29
1991	28
1992	27
1993	26
1994	25
1995	23
1996	22
1997	20
1998	19
1999	18
2000	17
2001	16
2002	15
2003	14
2004	14
2005	13
2006	13
2007	13
2008	13
2009	13
2010	13
2011	13
2012	12
2013	12
2014	12
2015	11
2016	11
2017	11
2018	11
2019	11
2020	12
2021	12
2022	12