Quarter	Percentage
1946-01-01	223.400
1946-04-01	229.500
1946-07-01	227.900
1946-10-01	221.400
1947-01-01	220.800
1947-04-01	220.600
1947-07-01	214.900
1947-10-01	208.200
1948-01-01	206.800
1948-04-01	210.600
1948-07-01	206.500
1948-10-01	204.700
1949-01-01	211.100
1949-04-01	217.200
1949-07-01	218.500
1949-10-01	219.800
1950-01-01	223.700
1950-04-01	222.200
1950-07-01	213.100
1950-10-01	201.500
1951-01-01	197.700
1951-04-01	198.300
1951-07-01	194.600
1951-10-01	189.800
1952-01-01	193.900
1952-04-01	199.300
1952-07-01	194.600
1952-10-01	192.300
1953-01-01	197.200
1953-04-01	199.800
1953-07-01	196.000
1953-10-01	195.500
1954-01-01	198.500
1954-04-01	203.500
1954-07-01	199.600
1954-10-01	195.200
1955-01-01	196.800
1955-04-01	197.500
1955-07-01	190.700
1955-10-01	185.100
1956-01-01	188.900
1956-04-01	189.700
1956-07-01	185.600
1956-10-01	182.300
1957-01-01	185.100
1957-04-01	186.400
1957-07-01	183.800
1957-10-01	183.800
1958-01-01	189.200
1958-04-01	191.100
1958-07-01	188.800
1958-10-01	186.900
1959-01-01	187.300
1959-04-01	185.300
1959-07-01	183.500
1959-10-01	181.100
1960-01-01	181.800
1960-04-01	180.900
1960-07-01	181.100
1960-10-01	180.200
1961-01-01	182.500
1961-04-01	183.700
1961-07-01	182.200
1961-10-01	179.200