Year	Number
1960	13227520
1961	13124738
1962	12934262
1963	12735859
1964	12549483
1965	12373341
1966	12186583
1967	12022749
1968	11865098
1969	11668253
1970	11484091
1971	11346103
1972	11232265
1973	11118088
1974	11000753
1975	10881129
1976	10757865
1977	10631094
1978	10496542
1979	10353322
1980	10201721
1981	10089484
1982	10060595
1983	10020407
1984	9972794
1985	9920133
1986	9860687
1987	9797703
1988	9730502
1989	9658018
1990	9580406
1991	9535852
1992	9550559
1993	9567936
1994	9581167
1995	9590975
1996	9598296
1997	9606162
1998	9613419
1999	9619750
2000	9630000
2001	9663982
2002	9722744
2003	9796815
2004	9862593
2005	9925418
2006	9988509
2007	10067486
2008	10120932
2009	10102486
2010	10041047
2011	9968815
2012	9868179
2013	9728205
2014	9590865
2015	9473817
2016	9371187
2017	9281373
2018	9209330
2019	9160656
2020	9089469
2021	8982448
2022	8932638
2023	8923913