Year	Number
1960	15299544
1961	15456497
1962	15623435
1963	15821615
1964	16033108
1965	16182196
1966	16296932
1967	16449431
1968	16603401
1969	16731190
1970	16790316
1971	16849076
1972	16981939
1973	17129152
1974	17285800
1975	17448865
1976	17616891
1977	17784309
1978	17925888
1979	18070423
1980	18236790
1981	18401741
1982	18569228
1983	18739715
1984	18905751
1985	19054503
1986	19183076
1987	19291780
1988	19377690
1989	19457007
1990	19541082
1991	19619741
1992	19690124
1993	19748921
1994	19798400
1995	19833831
1996	19856865
1997	19877592
1998	19893561
1999	19903175
2000	19684019
2001	19662876
2002	19660224
2003	19653302
2004	19648406
2005	19647126
2006	19644068
2007	19644001
2008	19654617
2009	19671857
2010	19617883
2011	19631168
2012	19634196
2013	19624797
2014	19611835
2015	19600554
2016	19594548
2017	19598693
2018	19599212
2019	19595179
2020	19564918
2021	19493868
2022	18995573
2023	18909456