Year	Number
1960	332399
1961	332399
1962	332399
1963	332399
1964	332399
1965	623394
1966	623394
1967	623394
1968	623394
1969	623394
1970	981356
1971	981356
1972	981356
1973	981356
1974	981356
1975	1465415
1976	1613644
1977	1726746
1978	1867828
1979	2016066
1980	2149470
1981	2295530
1982	2466364
1983	2668240
1984	2897862
1985	3165214
1986	3487908
1987	3800986
1988	4174278
1989	4588832
1990	5074734
1991	5809929
1992	6796748
1993	8025586
1994	9795304
1995	11978000
1996	14542651
1997	17801696
1998	21593686
1999	26511345
2000	32436134
2001	38536187
2002	41420000
2003	42000000
2004	46198025
2005	50176509
2006	40770000
2007	39250000
2008	37900000
2009	37060000
2010	35090000
2011	32835261
2012	30940618
2013	29032974
2014	27000105
2015	25520000
2016	24404000
2017	23234687
2018	21868192
2019	21004534
2020	20052162
2021	23773751
2022	27450000