Year	Number
1960	76333
1961	76709
1962	77113
1963	77252
1964	77494
1965	77985
1966	78791
1967	79829
1968	80998
1969	82434
1970	84353
1971	87001
1972	90528
1973	94938
1974	100051
1975	105498
1976	110868
1977	115854
1978	120096
1979	123369
1980	125692
1981	127509
1982	129262
1983	131000
1984	133017
1985	135494
1986	138379
1987	141651
1988	145310
1989	149395
1990	153755
1991	158383
1992	162852
1993	167008
1994	170904
1995	174529
1996	178386
1997	181966
1998	186847
1999	192000
2000	197004
2001	201769
2002	203926
2003	207370
2004	209998
2005	212439
2006	214778
2007	216826
2008	218727
2009	220377
2010	221775
2011	223711
2012	226742
2013	231545
2014	237539
2015	243298
2016	248801
2017	254603
2018	261047
2019	267421
2020	270726
2021	271310
2022	273071
2023	274188