Year	Number
1960	55880
1961	59038
1962	62403
1963	65897
1964	69142
1965	72205
1966	75485
1967	78959
1968	82613
1969	86291
1970	89611
1971	92418
1972	94843
1973	97031
1974	99121
1975	101175
1976	103305
1977	105566
1978	107847
1979	110078
1980	112252
1981	114208
1982	116025
1983	117943
1984	119950
1985	122034
1986	124140
1987	126196
1988	128290
1989	130535
1990	133065
1991	135741
1992	138557
1993	141526
1994	144309
1995	146949
1996	149491
1997	151955
1998	154412
1999	156702
2000	158879
2001	160964
2002	162950
2003	164975
2004	167044
2005	169176
2006	171363
2007	173576
2008	175825
2009	178154
2010	180438
2011	182453
2012	184251
2013	185807
2014	187310
2015	188854
2016	190240
2017	191491
2018	192656
2019	193737
2020	194506
2021	195028
2022	195817
2023	196863