Year	Number
1960	428807
1961	428807
1962	428807
1963	428807
1964	428807
1965	655000
1966	655000
1967	655000
1968	655000
1969	655000
1970	969000
1971	969000
1972	969000
1973	969000
1974	969000
1975	1505000
1976	1623000
1977	1747000
1978	1885000
1979	2033000
1980	2191000
1981	2323000
1982	2438672
1983	2547908
1984	2640843
1985	2729389
1986	2818437
1987	2906736
1988	3001319
1989	3102814
1990	3223161
1991	3344179
1992	3466493
1993	3579900
1994	3691800
1995	3796900
1996	3901600
1997	3969400
1998	4008000
1999	3939000
2000	3997000
2001	3997000
2002	3883000
2003	3877000
2004	3821000
2005	3739000
2006	3605000
2007	3407000
2008	3285000
2009	3253000
2010	3398000
2011	3388000
2012	3380000
2013	3334000
2014	3518900
2015	3609900
2016	3567200
2017	3711200
2018	3735346
2019	3722128
2020	3786725
2021	3808709
2022	3544263