Month	Million Square Feet
1956-01-01	135.800
1956-02-01	144.400
1956-03-01	190.400
1956-04-01	209.500
1956-05-01	197.700
1956-06-01	185.300
1956-07-01	181.700
1956-08-01	184.600
1956-09-01	161.400
1956-10-01	160.000
1956-11-01	147.100
1956-12-01	118.300
1957-01-01	136.500
1957-02-01	142.900
1957-03-01	176.200
1957-04-01	177.200
1957-05-01	200.300
1957-06-01	187.200
1957-07-01	189.000
1957-08-01	185.500
1957-09-01	169.200
1957-10-01	173.000
1957-11-01	147.700
1957-12-01	118.300
1958-01-01	126.500
1958-02-01	121.100
1958-03-01	164.900
1958-04-01	178.300
1958-05-01	200.600
1958-06-01	193.800
1958-07-01	216.100
1958-08-01	208.000
1958-09-01	194.200
1958-10-01	214.300
1958-11-01	165.200
1958-12-01	141.600
1959-01-01	148.300
1959-02-01	145.400
1959-03-01	208.600
1959-04-01	249.800
1959-05-01	228.600
1959-06-01	228.900
1959-07-01	230.300
1959-08-01	206.600
1959-09-01	200.600
1959-10-01	203.300
1959-11-01	154.300
1959-12-01	147.000
1960-01-01	138.600
1960-02-01	137.900
1960-03-01	187.800
1960-04-01	203.900
1960-05-01	207.300
1960-06-01	207.200
1960-07-01	194.300
1960-08-01	204.000
1960-09-01	182.300
1960-10-01	191.900
1960-11-01	174.900
1960-12-01	138.300
1961-01-01	136.800
1961-02-01	127.100
1961-03-01	194.300
1961-04-01	197.300
1961-05-01	209.900
1961-06-01	207.800
1961-07-01	204.100
1961-08-01	213.800
1961-09-01	189.100
1961-10-01	198.000
1961-11-01	184.000
1961-12-01	155.600
1962-01-01	160.300
1962-02-01	158.400
1962-03-01	215.100
1962-04-01	235.000
1962-05-01	244.700
1962-06-01	223.000
1962-07-01	216.100
1962-08-01	220.600
1962-09-01	197.600
1962-10-01	212.500
1962-11-01	187.400
1962-12-01	162.600
1963-01-01	172.800
1963-02-01	169.200
1963-03-01	218.500
1963-04-01	246.300
1963-05-01	272.400
1963-06-01	264.800
1963-07-01	251.800
1963-08-01	250.600
1963-09-01	230.800
1963-10-01	267.300
1963-11-01	203.100
1963-12-01	184.200