Year	Number
1960	70738
1961	71202
1962	71765
1963	72537
1964	73665
1965	75113
1966	76856
1967	78924
1968	81254
1969	83750
1970	86350
1971	89046
1972	91870
1973	94866
1974	98066
1975	101493
1976	105154
1977	109040
1978	113120
1979	117364
1980	121723
1981	126094
1982	130373
1983	134481
1984	138273
1985	141677
1986	144718
1987	147435
1988	149944
1989	152451
1990	155030
1991	157590
1992	159969
1993	162009
1994	163669
1995	164992
1996	166074
1997	167146
1998	168444
1999	169952
2000	171596
2001	173349
2002	175219
2003	177283
2004	179697
2005	182870
2006	186880
2007	191301
2008	195765
2009	199916
2010	203497
2011	206860
2012	210146
2013	213828
2014	217886
2015	222137
2016	226869
2017	231746
2018	236614
2019	241433
2020	244625
2021	246072
2022	247479
2023	250072