Year	Number
1960	186627
1961	190503
1962	193863
1963	197060
1964	199987
1965	202279
1966	203816
1967	204757
1968	205181
1969	204832
1970	203475
1971	202168
1972	201802
1973	201672
1974	201093
1975	200021
1976	198657
1977	197165
1978	196034
1979	195917
1980	197046
1981	199364
1982	202490
1983	205885
1984	209218
1985	212743
1986	216064
1987	218217
1988	219263
1989	219501
1990	219014
1991	217813
1992	215915
1993	213119
1994	209285
1995	204511
1996	198894
1997	192700
1998	186356
1999	180294
2000	174520
2001	169030
2002	164134
2003	159982
2004	156612
2005	154003
2006	152081
2007	150724
2008	149893
2009	149462
2010	149427
2011	149821
2012	150458
2013	151122
2014	151598
2015	151851
2016	151929
2017	151837
2018	152232
2019	152011
2020	150900
2021	149898
2022	148443
2023	146587