Year	Number
1960	39553
1961	42024
1962	44414
1963	46706
1964	48864
1965	50858
1966	52679
1967	54350
1968	55919
1969	57456
1970	59020
1971	60697
1972	62482
1973	64124
1974	65454
1975	66526
1976	67430
1977	68282
1978	69219
1979	70384
1980	71858
1981	73648
1982	75675
1983	77757
1984	79830
1985	81952
1986	84176
1987	86554
1988	89075
1989	91679
1990	94303
1991	97141
1992	100380
1993	103561
1994	106241
1995	108393
1996	109950
1997	110855
1998	111169
1999	111083
2000	110747
2001	110190
2002	109447
2003	108582
2004	107642
2005	106697
2006	105795
2007	104941
2008	104143
2009	103421
2010	102797
2011	102411
2012	102293
2013	102295
2014	102234
2015	101998
2016	101677
2017	101306
2018	100885
2019	100452
2020	100001
2021	99525
2022	99030
2023	98460