Month	Million Square Feet
1956-01-01	77.1000
1956-02-01	88.6000
1956-03-01	112.000
1956-04-01	127.300
1956-05-01	122.400
1956-06-01	112.900
1956-07-01	105.400
1956-08-01	112.400
1956-09-01	95.7000
1956-10-01	96.0000
1956-11-01	81.4000
1956-12-01	62.5000
1957-01-01	73.3000
1957-02-01	82.1000
1957-03-01	99.4000
1957-04-01	113.500
1957-05-01	120.100
1957-06-01	106.400
1957-07-01	117.400
1957-08-01	116.900
1957-09-01	105.200
1957-10-01	106.600
1957-11-01	86.4000
1957-12-01	67.2000
1958-01-01	72.6000
1958-02-01	68.5000
1958-03-01	98.4000
1958-04-01	114.700
1958-05-01	124.500
1958-06-01	125.700
1958-07-01	140.700
1958-08-01	132.400
1958-09-01	131.200
1958-10-01	144.600
1958-11-01	107.800
1958-12-01	89.1000
1959-01-01	92.5000
1959-02-01	95.3000
1959-03-01	139.400
1959-04-01	162.300
1959-05-01	149.700
1959-06-01	155.500
1959-07-01	147.400
1959-08-01	136.800
1959-09-01	128.600
1959-10-01	128.300
1959-11-01	95.8000
1959-12-01	88.3000
1960-01-01	82.3000
1960-02-01	86.2000
1960-03-01	112.300
1960-04-01	128.300
1960-05-01	125.300
1960-06-01	128.300
1960-07-01	113.800
1960-08-01	123.600
1960-09-01	108.100
1960-10-01	114.700
1960-11-01	109.200
1960-12-01	74.4000
1961-01-01	81.0000
1961-02-01	74.4000
1961-03-01	118.700
1961-04-01	123.600
1961-05-01	132.100
1961-06-01	131.600
1961-07-01	125.100
1961-08-01	134.700
1961-09-01	116.200
1961-10-01	129.000
1961-11-01	110.400
1961-12-01	92.1000
1962-01-01	102.300
1962-02-01	100.500
1962-03-01	130.800
1962-04-01	154.300
1962-05-01	154.000
1962-06-01	138.300
1962-07-01	136.200
1962-08-01	138.400
1962-09-01	124.100
1962-10-01	135.500
1962-11-01	114.900
1962-12-01	98.1000
1963-01-01	105.900
1963-02-01	104.000
1963-03-01	140.000
1963-04-01	170.400
1963-05-01	176.700
1963-06-01	167.400
1963-07-01	165.600
1963-08-01	158.700
1963-09-01	153.200
1963-10-01	174.100
1963-11-01	130.600
1963-12-01	114.800