Year	Number
1960	69584
1961	71276
1962	72963
1963	74703
1964	76491
1965	78349
1966	80303
1967	82360
1968	84495
1969	86673
1970	88891
1971	91122
1972	93374
1973	95641
1974	98021
1975	100588
1976	103361
1977	106277
1978	109244
1979	112258
1980	115277
1981	118266
1982	121213
1983	124135
1984	127044
1985	129843
1986	132375
1987	134576
1988	136458
1989	138058
1990	139414
1991	140500
1992	141322
1993	141902
1994	142262
1995	142561
1996	142795
1997	142992
1998	143564
1999	144591
2000	145892
2001	147559
2002	149683
2003	152280
2004	155243
2005	158462
2006	161921
2007	165580
2008	169616
2009	174324
2010	179548
2011	185041
2012	190456
2013	193864
2014	195761
2015	198465
2016	202072
2017	206392
2018	211483
2019	217294
2020	222694
2021	227141
2022	231613
2023	237404