Year	Number
1961	495737
1962	528573
1963	565348
1964	599384
1965	627617
1966	668130
1967	722766
1968	767277
1969	818170
1970	849128
1971	918416
1972	986984
1973	1051203
1974	1137560
1975	1231952
1976	1332328
1977	1447379
1978	1540926
1979	1662573
1980	1723324
1981	1890045
1982	1987610
1983	2097236
1984	2250757
1985	2404597.5700000003
1986	2581251.14
1987	2745027.71
1988	2908162
1989	3151457
1990	3314871
1991	3438455
1992	3645186
1993	3714869
1994	3736817
1995	3916226
1996	4075062
1997	4346911
1998	4439284
1999	4599890.5
2000	4736993
2002	5002742