Year	Number
1960	551183
1961	552819
1962	551737
1963	547572
1964	541439
1965	535107
1966	529363
1967	522999
1968	515471
1969	507189
1970	498363
1971	490724
1972	485231
1973	481475
1974	478524
1975	475959
1976	474220
1977	473298
1978	473155
1979	472791
1980	471127
1981	469816
1982	470448
1983	472344
1984	474270
1985	475638
1986	475450
1987	473381
1988	470061
1989	465650
1990	460810
1991	447083
1992	430075
1993	423399
1994	418313
1995	408095
1996	398445
1997	393541
1998	390044
1999	384707
2000	377201
2001	358535
2002	353155
2003	347605
2004	342488
2005	338486
2006	334444
2007	330745
2008	328176
2009	325525
2010	321893
2011	316755
2012	311216
2013	306082
2014	301161
2015	295747
2016	291537
2017	286749
2018	283447
2019	281383
2020	279184
2021	266466
2022	263860
2023	261940