Year	Number
1961	938248
1962	1012059
1963	1095070
1964	1176380
1965	1264098
1966	1370713
1967	1486670
1968	1605809.52
1969	1732104.12
1970	1770390.72
1971	1919043.08
1972	2079767.08
1973	2252981.88
1974	2449151.04
1975	2744934.48
1976	2972013.3200000003
1977	3234795.3200000003
1978	3524139
1979	3877156
1980	4132889
1981	4445175
1982	4648737
1983	4854137
1984	5114206
1985	5429651.57
1986	5710491.140000001
1987	5956954.71
1988	6160869
1989	6438925
1990	6605139
1991	6729009
1992	9311453
1993	9317298
1994	9435321
1995	9511144
1996	9506093
1997	9667692
1998	9739858
1999	9946688.5
2000	10239895