Year	Number
1960	729016
1961	738240
1962	745437
1963	751417
1964	759311
1965	767646
1966	776668
1967	786415
1968	796789
1969	807857
1970	819179
1971	829904
1972	840763
1973	852317
1974	864057
1975	876078
1976	888420
1977	901125
1978	914162
1979	927526
1980	941088
1981	954925
1982	966124
1983	973818
1984	980615
1985	986760
1986	992154
1987	996838
1988	1000879
1989	1004326
1990	1006573
1991	1002723
1992	994572
1993	986674
1994	981702
1995	981986
1996	985796
1997	987127
1998	992330
1999	998672
2000	1006416
2001	1013819
2002	1008305
2003	1009972
2004	1007002
2005	1001883
2006	996698
2007	991324
2008	985838
2009	979717
2010	973730
2011	969518
2012	965916
2013	962555
2014	960192
2015	957806
2016	954928
2017	951258
2018	946584
2019	940306
2020	930393
2021	921149
2022	918720
2023	909019