Year	Number
1960	3057645
1961	3057650
1962	3057650
1963	3057650
1964	3057650
1965	4540000
1966	4540000
1967	4540000
1968	4540000
1969	4540000
1970	6461000
1971	6461000
1972	6461000
1973	6461000
1974	6461000
1975	9660000
1976	10166000
1977	10778000
1978	11456000
1979	12172000
1980	13017000
1981	13860000
1982	14697780
1983	15601029
1984	16520763
1985	17396112
1986	18252972
1987	19104828
1988	20091532
1989	21265518
1990	22350000
1991	23071000
1992	23709000
1993	24167000
1994	24542000
1995	24845000
1996	25259000
1997	25698000
1998	25986120
1999	26502000
2000	27153000
2001	27353000
2002	27142000
2003	26596000
2004	25957000
2005	25049000
2006	26890339
2007	22417000
2008	22039000
2009	22642679
2010	22536367
2011	22105471
2012	21748814
2013	21098033
2014	20581426
2015	20209324
2016	20267173
2017	20700659
2018	20396603
2019	19519434
2020	19607341
2021	19994902
2022	19982393