Year	Number
1960	95785
1961	96620
1962	97044
1963	96886
1964	96498
1965	95746
1966	94841
1967	94141
1968	93595
1969	92858
1970	92005
1971	91351
1972	90486
1973	89273
1974	88807
1975	88703
1976	88471
1977	87905
1978	87264
1979	86604
1980	85428
1981	84240
1982	83342
1983	82413
1984	81440
1985	80072
1986	78359
1987	76605
1988	74622
1989	72384
1990	70184
1991	67961
1992	65630
1993	63948
1994	61962
1995	59237
1996	56067
1997	52520
1998	49363
1999	46509
2000	43846
2001	41160
2002	38476
2003	36249
2004	34286
2005	32116
2006	29935
2007	27982
2008	26325
2009	24855
2010	23532
2011	22421
2012	21495
2013	20600
2014	19743
2015	18876
2016	17977
2017	17107
2018	16267
2019	15560
2020	14925
2021	14406
2022	14025