Year	Number
1960	75707
1961	76253
1962	76571
1963	77260
1964	78534
1965	80242
1966	82803
1967	86080
1968	89711
1969	93040
1970	95691
1971	97945
1972	99874
1973	101585
1974	103727
1975	106057
1976	108497
1977	111184
1978	113728
1979	115661
1980	116731
1981	116987
1982	116327
1983	115278
1984	115866
1985	118568
1986	122064
1987	126194
1988	131381
1989	137134
1990	140614
1991	142683
1992	144491
1993	144367
1994	144521
1995	146578
1996	148707
1997	150328
1998	151596
1999	152275
2000	152616
2001	153687
2002	155912
2003	158958
2004	161920
2005	163561
2006	163487
2007	160399
2008	154114
2009	146455
2010	138923
2011	133609
2012	131769
2013	132167
2014	134088
2015	137524
2016	141975
2017	147208
2018	153383
2019	160855
2020	168673
2021	179121
2022	191885
2023	204825