Year	Number
1960	47109
1961	48657
1962	50563
1963	52804
1964	55325
1965	58044
1966	60840
1967	63584
1968	66305
1969	69017
1970	71635
1971	74103
1972	76406
1973	78549
1974	80724
1975	83021
1976	85431
1977	88002
1978	90486
1979	92836
1980	94849
1981	96166
1982	96870
1983	97271
1984	97931
1985	100316
1986	104206
1987	108093
1988	112220
1989	116113
1990	118586
1991	120302
1992	120586
1993	119880
1994	120304
1995	121544
1996	122629
1997	122817
1998	122362
1999	121735
2000	122390
2001	124379
2002	126490
2003	128725
2004	130874
2005	132504
2006	133146
2007	132301
2008	129960
2009	126924
2010	123975
2011	121955
2012	121300
2013	122129
2014	124509
2015	128230
2016	133181
2017	139136
2018	145989
2019	153967
2020	161541
2021	170760
2022	183208
2023	197134