Year	Number
1960	167000
1961	164000
1962	160000
1963	157000
1964	160000
1965	170000
1966	167000
1967	164000
1968	161000
1969	162000
1970	162000
1971	150000
1972	150000
1973	150000
1974	155500
1975	153000
1976	153000
1977	148000
1978	150000
1979	146000
1980	148000
1981	146000
1982	143000
1983	140000
1984	135000
1985	135000
1986	100000
1987	100000
1988	39755
1989	46014
1990	43625
1991	43368
1992	64717
1993	80230
1994	85159
1995	90908
1996	98577
1997	107933
1998	121715
1999	148921
2000	186247
2001	233389
2002	260687
2003	276482
2004	298826
2005	303163
2006	301537
2007	299701
2008	292081
2009	269355
2010	238133
2011	193494
2012	149790
2013	126036
2014	117226
2015	123051
2016	118973
2017	121821
2018	126708
2019	133083
2020	132304
2021	137078
2022	328989
2023	448620