Year	Number
1960	264717
1961	267232
1962	270545
1963	273339
1964	274756
1965	276013
1966	276926
1967	277070
1968	276211
1969	274624
1970	272621
1971	270650
1972	268440
1973	265784
1974	263013
1975	260261
1976	257566
1977	255616
1978	254905
1979	255140
1980	256134
1981	257991
1982	259517
1983	260161
1984	260646
1985	260904
1986	260952
1987	260743
1988	260087
1989	258833
1990	256692
1991	251795
1992	247514
1993	245615
1994	243641
1995	241519
1996	238399
1997	233103
1998	228043
1999	223852
2000	221435
2001	220180
2002	215599
2003	211604
2004	206348
2005	200260
2006	194103
2007	188313
2008	183010
2009	177890
2010	173254
2011	169227
2012	165706
2013	162703
2014	160237
2015	158024
2016	155622
2017	152821
2018	149688
2019	146822
2020	144272
2021	142262
2022	141320
2023	138981