Month	Million Square Feet
1956-01-01	21.8300
1956-02-01	16.1800
1956-03-01	22.9000
1956-04-01	25.1300
1956-05-01	24.1400
1956-06-01	21.7300
1956-07-01	22.9500
1956-08-01	21.9800
1956-09-01	19.9900
1956-10-01	21.3200
1956-11-01	23.0400
1956-12-01	19.4300
1957-01-01	19.9300
1957-02-01	22.0100
1957-03-01	25.5400
1957-04-01	20.4500
1957-05-01	27.5800
1957-06-01	26.0400
1957-07-01	21.9700
1957-08-01	22.8800
1957-09-01	22.9400
1957-10-01	23.6600
1957-11-01	23.5000
1957-12-01	17.4900
1958-01-01	19.8700
1958-02-01	20.6400
1958-03-01	24.4300
1958-04-01	22.6500
1958-05-01	29.2800
1958-06-01	26.7400
1958-07-01	25.4800
1958-08-01	25.0800
1958-09-01	21.5900
1958-10-01	23.1400
1958-11-01	20.5700
1958-12-01	19.4900
1959-01-01	17.6500
1959-02-01	16.8200
1959-03-01	21.2600
1959-04-01	28.2800
1959-05-01	21.8700
1959-06-01	25.9300
1959-07-01	26.1600
1959-08-01	21.0800
1959-09-01	20.9400
1959-10-01	20.1300
1959-11-01	17.0200
1959-12-01	18.0400
1960-01-01	16.5900
1960-02-01	14.5500
1960-03-01	27.0200
1960-04-01	21.3400
1960-05-01	25.3600
1960-06-01	25.7200
1960-07-01	24.2200
1960-08-01	23.4200
1960-09-01	22.6200
1960-10-01	22.9600
1960-11-01	19.8700
1960-12-01	23.9500
1961-01-01	19.0900
1961-02-01	18.2400
1961-03-01	25.1800
1961-04-01	24.3600
1961-05-01	25.7000
1961-06-01	26.7400
1961-07-01	27.3800
1961-08-01	20.9500
1961-09-01	22.3700
1961-10-01	21.5800
1961-11-01	23.1700
1961-12-01	20.0200
1962-01-01	19.4800
1962-02-01	18.3700
1962-03-01	26.2400
1962-04-01	26.3100
1962-05-01	26.7800
1962-06-01	29.4200
1962-07-01	24.4400
1962-08-01	20.7800
1962-09-01	22.4400
1962-10-01	22.1200
1962-11-01	21.9600
1962-12-01	20.5400
1963-01-01	22.1700
1963-02-01	24.3400
1963-03-01	27.8300
1963-04-01	25.0000
1963-05-01	29.0700
1963-06-01	30.0900
1963-07-01	26.5400
1963-08-01	28.1200
1963-09-01	23.3100
1963-10-01	26.9800
1963-11-01	22.1500
1963-12-01	23.2400