Year	Number
1967	153128
1968	154451
1969	155695
1970	156856
1971	158046
1972	159037
1973	160031
1974	161051
1975	161983
1976	162364
1977	162520
1978	162269
1979	161539
1980	158624
1981	150797
1982	135866
1983	122541
1984	115306
1985	111488
1986	108492
1987	104536
1988	101013
1989	98809
1990	97869
1991	95353
1992	93206
1993	98691
1994	108057
1995	114976
1996	119447
1997	122300
1998	124029
1999	124843
2000	124874
2001	121904
2002	117915
2003	118000
2004	118750
2005	116210
2006	113847
2007	112170
2008	106703
2009	101659
2010	99252
2011	96199
2012	94537
2013	93805
2014	92584
2015	91818
2016	90442
2017	88444
2018	87019
2019	85625
2020	84225
2021	83288
2022	81903