Year	Number
1960	48688
1961	49508
1962	50285
1963	51079
1964	51989
1965	53027
1966	54213
1967	55589
1968	57030
1969	58316
1970	59412
1971	60344
1972	61150
1973	61995
1974	63097
1975	64574
1976	66354
1977	68475
1978	72562
1979	78892
1980	85848
1981	93228
1982	101072
1983	109100
1984	116949
1985	124406
1986	130805
1987	145919
1988	158224
1989	158473
1990	158487
1991	157757
1992	157228
1993	154708
1994	148323
1995	147895
1996	154512
1997	160149
1998	163734
1999	171137
2000	182222
2001	191345
2002	200171
2003	209227
2004	218343
2005	227010
2006	234797
2007	240576
2008	240105
2009	235601
2010	232463
2011	230374
2012	228941
2013	227386
2014	225594
2015	223521
2016	221268
2017	219452
2018	218121
2019	217324
2020	216188
2021	213735
2022	211014
2023	210062