Year	Number
1960	162139
1961	171392
1962	177691
1963	183954
1964	191080
1965	198985
1966	206759
1967	214504
1968	222145
1969	229525
1970	235588
1971	240996
1972	248019
1973	255924
1974	264317
1975	272186
1976	278798
1977	285293
1978	291902
1979	298368
1980	300471
1981	296378
1982	289941
1983	282563
1984	280850
1985	285345
1986	291915
1987	300700
1988	309874
1989	317990
1990	324685
1991	329816
1992	334594
1993	340621
1994	347055
1995	353297
1996	359418
1997	365457
1998	370319
1999	374119
2000	376769
2001	379297
2002	382606
2003	386076
2004	390127
2005	394645
2006	399632
2007	404974
2008	410480
2009	416892
2010	422673
2011	428437
2012	437220
2013	448472
2014	460839
2015	474164
2016	489291
2017	505345
2018	520930
2019	536704
2020	552031
2021	563110
2022	551805
2023	548193