Month	Million Square Feet
1956-01-01	16.5700
1956-02-01	16.8000
1956-03-01	23.4100
1956-04-01	24.8800
1956-05-01	21.7300
1956-06-01	22.6000
1956-07-01	21.7400
1956-08-01	23.3900
1956-09-01	20.4700
1956-10-01	19.3900
1956-11-01	17.5900
1956-12-01	15.7900
1957-01-01	19.2200
1957-02-01	16.7100
1957-03-01	22.7400
1957-04-01	20.4500
1957-05-01	24.1000
1957-06-01	22.3600
1957-07-01	23.2800
1957-08-01	22.9100
1957-09-01	19.7000
1957-10-01	19.4400
1957-11-01	18.4700
1957-12-01	15.1200
1958-01-01	18.8800
1958-02-01	15.3900
1958-03-01	21.0200
1958-04-01	21.0000
1958-05-01	20.3200
1958-06-01	18.9900
1958-07-01	23.1800
1958-08-01	25.4300
1958-09-01	22.5000
1958-10-01	23.5400
1958-11-01	18.8600
1958-12-01	16.1900
1959-01-01	20.2400
1959-02-01	15.2800
1959-03-01	24.2300
1959-04-01	27.6300
1959-05-01	26.5100
1959-06-01	23.7500
1959-07-01	29.3000
1959-08-01	24.6300
1959-09-01	25.4100
1959-10-01	27.2900
1959-11-01	18.9100
1959-12-01	19.9500
1960-01-01	20.3800
1960-02-01	16.6200
1960-03-01	22.7400
1960-04-01	24.6600
1960-05-01	24.9400
1960-06-01	25.9800
1960-07-01	25.0900
1960-08-01	29.3500
1960-09-01	26.4000
1960-10-01	26.7700
1960-11-01	22.0300
1960-12-01	21.0500
1961-01-01	20.0000
1961-02-01	18.0900
1961-03-01	25.6800
1961-04-01	24.5000
1961-05-01	26.6000
1961-06-01	25.0000
1961-07-01	27.1500
1961-08-01	27.6000
1961-09-01	28.4100
1961-10-01	26.3200
1961-11-01	25.9200
1961-12-01	21.1300
1962-01-01	20.9800
1962-02-01	20.5500
1962-03-01	29.6000
1962-04-01	26.9700
1962-05-01	33.8400
1962-06-01	29.7700
1962-07-01	28.6700
1962-08-01	30.5400
1962-09-01	30.1300
1962-10-01	28.3900
1962-11-01	26.9700
1962-12-01	23.8400
1963-01-01	25.5900
1963-02-01	21.0500
1963-03-01	24.9600
1963-04-01	26.2100
1963-05-01	33.9100
1963-06-01	35.8400
1963-07-01	32.6000
1963-08-01	32.5600
1963-09-01	29.4700
1963-10-01	35.6000
1963-11-01	26.7800
1963-12-01	26.1800