Year	Number
1960	156811
1961	157594
1962	162382
1963	166482
1964	169564
1965	171853
1966	173470
1967	174580
1968	175320
1969	175675
1970	175569
1971	174944
1972	173873
1973	172679
1974	171574
1975	170582
1976	169658
1977	168735
1978	167282
1979	166701
1980	166309
1981	165908
1982	165311
1983	164406
1984	164060
1985	163681
1986	163372
1987	163008
1988	162344
1989	161726
1990	161061
1991	160679
1992	160362
1993	159638
1994	158956
1995	157219
1996	155847
1997	155157
1998	154359
1999	154374
2000	154398
2001	154216
2002	154006
2003	153702
2004	152967
2005	151752
2006	149814
2007	147417
2008	144585
2009	141555
2010	138626
2011	135737
2012	133133
2013	130650
2014	127765
2015	124450
2016	121186
2017	118096
2018	115018
2019	111943
2020	108990
2021	106562
2022	104198
2023	102258