Year	Number
1960	175574
1961	179029
1962	182378
1963	185653
1964	188983
1965	192286
1966	195570
1967	198751
1968	201488
1969	203369
1970	204438
1971	206098
1972	209137
1973	212317
1974	215209
1975	217979
1976	220154
1977	221799
1978	223537
1979	225735
1980	228138
1981	230755
1982	233860
1983	236977
1984	239511
1985	241405
1986	243180
1987	245859
1988	249740
1989	252852
1990	254826
1991	257797
1992	261057
1993	263725
1994	266021
1995	267468
1996	268916
1997	271128
1998	274047
1999	277381
2000	281205
2001	284968
2002	287523
2003	289521
2004	292074
2005	296734
2006	303782
2007	311566
2008	317414
2009	318499
2010	318041
2011	319014
2012	320716
2013	323764
2014	327386
2015	330815
2016	335439
2017	343400
2018	352721
2019	360563
2020	366463
2021	372520
2022	382003
2023	393600