Year	Number
1960	22791197
1961	22814974
1962	22889636
1963	22992282
1964	23070907
1965	23170223
1966	23264614
1967	23270881
1968	23300615
1969	23443514
1970	23504555
1971	23570833
1972	23754019
1973	23946095
1974	24114895
1975	24224142
1976	24354331
1977	24539438
1978	24768679
1979	25056455
1980	25420506
1981	25824528
1982	26189468
1983	26496279
1984	26707463
1985	26834664
1986	26962460
1987	27078697
1988	27222146
1989	27453758
1990	27688111
1991	27875138
1992	28074543
1993	28227630
1994	28287195
1995	28343631
1996	28408332
1997	28433497
1998	28413779
1999	28359550
2000	28266646
2001	28174019
2002	28095100
2003	27988996
2004	27838121
2005	27669039
2006	27504419
2007	27391936
2008	27314261
2009	27229970
2010	27237682
2011	26827647
2012	26936345
2013	27032774
2014	27121388
2015	27295588
2016	27425635
2017	27410386
2018	27363176
2019	27282697
2020	27162860
2021	27037021
2022	27096079
2023	27167880