Year	Number
1960	232550
1961	233698
1962	234829
1963	235875
1964	236834
1965	237694
1966	238494
1967	239238
1968	239905
1969	240594
1970	241397
1971	242350
1972	243458
1973	244643
1974	245851
1975	247090
1976	248359
1977	249663
1978	251009
1979	252334
1980	253575
1981	254684
1982	255642
1983	256505
1984	257279
1985	257911
1986	258370
1987	258654
1988	258762
1989	258759
1990	258868
1991	259402
1992	260212
1993	260995
1994	261712
1995	262303
1996	262793
1997	263224
1998	263642
1999	264170
2000	264657
2001	265377
2002	266455
2003	267499
2004	268505
2005	269477
2006	270425
2007	271444
2008	272635
2009	273791
2010	274711
2011	275486
2012	276197
2013	276865
2014	277493
2015	278083
2016	278649
2017	279187
2018	279688
2019	280180
2020	280693
2021	281200
2022	281635
2023	281995