Year	Number
1960	34035
1961	34736
1962	35480
1963	36136
1964	36886
1965	37686
1966	38205
1967	38453
1968	38556
1969	38587
1970	38475
1971	38454
1972	38307
1973	38036
1974	37926
1975	37715
1976	37272
1977	36711
1978	36198
1979	35577
1980	34942
1981	34479
1982	33964
1983	33309
1984	32775
1985	32422
1986	32199
1987	32211
1988	32528
1989	33128
1990	33969
1991	34888
1992	35799
1993	36797
1994	37757
1995	38665
1996	39506
1997	40297
1998	41149
1999	41951
2000	42487
2001	42838
2002	43167
2003	43565
2004	44005
2005	44357
2006	44688
2007	44972
2008	45281
2009	45654
2010	46052
2011	46260
2012	46575
2013	47212
2014	47851
2015	48484
2016	48984
2017	49678
2018	50240
2019	50907
2020	51553
2021	52069
2022	52771
2023	53671