Year	Number
1960	182426
1961	186251
1962	189869
1963	193259
1964	196269
1965	198868
1966	201145
1967	202861
1968	203686
1969	203347
1970	201699
1971	199908
1972	198970
1973	198243
1974	197119
1975	195521
1976	193780
1977	192277
1978	191460
1979	191588
1980	192453
1981	194014
1982	196409
1983	199428
1984	202601
1985	205998
1986	209207
1987	211310
1988	212340
1989	212605
1990	212194
1991	211094
1992	209319
1993	206668
1994	202989
1995	198372
1996	192926
1997	186917
1998	180754
1999	174843
2000	169181
2001	163784
2002	158970
2003	154893
2004	151569
2005	148964
2006	147013
2007	145608
2008	144722
2009	144248
2010	144182
2011	144547
2012	145146
2013	145768
2014	146210
2015	146443
2016	146504
2017	146399
2018	146737
2019	146537
2020	145511
2021	144546
2022	143157
2023	141387