Year	Number
1961	566063
1962	609610
1963	659203
1964	705037
1965	748288
1966	819378
1967	881394
1968	953078
1969	1033099
1970	1018165
1971	1082588
1972	1169331
1973	1274119
1974	1388002
1975	1596947
1976	1720585
1977	1872388
1978	2077521
1979	2292910
1980	2464366
1981	2644119
1982	2721107
1983	2811080
1984	2903208
1985	2986684.57
1986	3102411.14
1987	3198381.71
1988	3273155
1989	3308060
1990	3339620
1991	3350539
1992	5245845
1993	5170028
1994	5042948
1995	4957718
1996	4822880
1997	4766409
1998	4770968
1999	4817932
2000	5043802
2002	4089297