Year	Number
1960	151771
1961	152221
1962	156636
1963	160570
1964	163649
1965	166015
1966	167754
1967	168958
1968	169685
1969	169911
1970	169609
1971	168804
1972	167613
1973	166333
1974	165172
1975	164174
1976	163277
1977	162379
1978	160942
1979	160300
1980	159801
1981	159275
1982	158609
1983	157767
1984	157555
1985	157326
1986	157113
1987	156774
1988	156092
1989	155466
1990	154838
1991	154555
1992	154404
1993	153868
1994	153377
1995	151850
1996	150657
1997	150106
1998	149423
1999	149508
2000	149602
2001	149565
2002	149570
2003	149512
2004	148991
2005	147939
2006	146173
2007	143945
2008	141269
2009	138394
2010	135613
2011	132879
2012	130429
2013	128074
2014	125296
2015	122052
2016	118822
2017	115750
2018	112688
2019	109605
2020	106609
2021	104126
2022	101695
2023	99652