Year	Number
1961	871623
1962	940438
1963	1020282
1964	1098318
1965	1181828
1966	1281925
1967	1389832
1968	1502414.52
1969	1618138.12
1970	1647470.72
1971	1793947.08
1972	1942706.08
1973	2116614.88
1974	2306016.04
1975	2594167.48
1976	2802673.3200000003
1977	3047375.3200000003
1978	3324055
1979	3660369
1980	3900438
1981	4194209
1982	4382365
1983	4566117
1984	4805302
1985	5114020.57
1986	5367602.14
1987	5586114.71
1988	5767746
1989	6016568
1990	6155455
1991	6269418
1992	8772395
1993	8785421
1994	8908792
1995	8928233
1996	8912259
1997	9053402
1998	9125369
1999	9314581.5
2000	9626651
2001	8744833
2002	8983301