Quarter	Percentage
1961-10-01	195.600
1962-01-01	195.700
1962-04-01	194.700
1962-07-01	191.500
1962-10-01	191.000
1963-01-01	190.600
1963-04-01	188.600
1963-07-01	188.400
1963-10-01	186.900
1964-01-01	188.500
1964-04-01	187.500
1964-07-01	186.200
1964-10-01	184.100
1965-01-01	183.800
1965-04-01	182.600
1965-07-01	181.400
1965-10-01	178.700
1966-01-01	179.000
1966-04-01	179.200
1966-07-01	177.300
1966-10-01	175.100
1967-01-01	176.600
1967-04-01	177.200
1967-07-01	177.300
1967-10-01	176.500
1968-01-01	177.600
1968-04-01	177.100
1968-07-01	175.000
1968-10-01	173.300
1969-01-01	172.300