Year	Number
1960	20544
1961	20544
1962	20544
1963	20544
1964	20544
1966	20544
1967	20544
1968	20544
1969	20544
1971	20544
1972	20544
1973	20544
1974	20544
1981	163360
1982	151600
1983	182550
1984	192560
1985	203980
1986	215630
1987	227460
1988	235530
1989	250000
1990	289190
1991	294166
1992	320934
1993	342287
1994	368715
1995	405073
1996	412779
1997	404177
1998	438619
1999	473316
2000	553374
2001	600321
2002	702000
2003	888534
2004	1027519
2005	1223258
2006	1687972
2007	1579664
2008	1307625
2009	1482000
2010	1050237
2011	719406
2012	418166
2013	360537
2014	183290
2015	187155
2016	154513
2017	139344
2018	140491
2019	107154
2020	107031
2021	106385
2022	96996