Year	Number
1965	3000
1966	250
1972	129000
1973	131895
1974	120880
1975	141940
1976	152320
1977	153550
1978	148180
1979	151680
1980	169770
1981	182950
1982	176270
1983	176550
1984	182910
1985	199810
1986	210620
1987	186910
1988	190153
1989	191441
1990	191619
1991	223942
1992	184129
1993	871376
1994	389698
1995	350575
1996	428680
1997	519116
1998	502555
1999	527437
2000	568070
2001	553987
2002	574552
2003	531626
2004	485753
2005	438695
2006	396533
2007	375720
2008	281583
2009	94221
2010	84053
2011	101282
2012	73354
2013	72636
2014	72477
2015	292750
2016	408066
2017	439320
2018	387850
2019	380900
2020	372951
2021	323635
2022	320702
2023	319857