Year	Number
1965	306000
1966	306000
1967	306000
1968	306000
1969	306000
1970	440000
1971	440000
1972	440000
1973	440000
1974	440000
1975	857000
1976	984000
1977	1133000
1978	1300000
1979	1480000
1980	1618000
1981	1700000
1982	1750000
1983	1800000
1984	1900000
1985	1963000
1986	2083115
1987	2171222
1988	2256205
1989	2337882
1990	2365830
1991	2445276
1992	2574070
1993	2603600
1994	2805636
1995	2967957
1996	3175533
1997	3398000
1998	3599000
1999	3740000
2000	3899206
2001	4116000
2002	4215235
2003	4331564
2004	4388000
2005	4383000
2006	4198000
2007	4416000
2008	4750000
2009	4730000
2010	4500000
2011	4680000
2012	4650000
2013	4720000
2014	4560000
2015	4270000
2016	4110000
2017	3890000
2018	3660000
2019	3380000
2020	3025000
2021	2606000
2022	2222000