Month	Million Square Feet
1956-01-01	12.6600
1956-02-01	14.8900
1956-03-01	20.8000
1956-04-01	20.7100
1956-05-01	15.8600
1956-06-01	15.2200
1956-07-01	18.8700
1956-08-01	15.8900
1956-09-01	15.6000
1956-10-01	13.9800
1956-11-01	15.4500
1956-12-01	12.1900
1957-01-01	17.0400
1957-02-01	15.4500
1957-03-01	16.6000
1957-04-01	13.4100
1957-05-01	15.3900
1957-06-01	20.7400
1957-07-01	15.3000
1957-08-01	13.1400
1957-09-01	11.8100
1957-10-01	14.0200
1957-11-01	11.5900
1957-12-01	11.7200
1958-01-01	8.87000
1958-02-01	7.64000
1958-03-01	9.51000
1958-04-01	6.83000
1958-05-01	11.2400
1958-06-01	8.08000
1958-07-01	11.4700
1958-08-01	12.6700
1958-09-01	8.44000
1958-10-01	12.1800
1958-11-01	9.44000
1958-12-01	7.64000
1959-01-01	7.86000
1959-02-01	9.17000
1959-03-01	11.5800
1959-04-01	16.8000
1959-05-01	15.8900
1959-06-01	12.5000
1959-07-01	13.9800
1959-08-01	13.6100
1959-09-01	14.5200
1959-10-01	17.4700
1959-11-01	14.2400
1959-12-01	12.3900
1960-01-01	11.5900
1960-02-01	10.5200
1960-03-01	14.5700
1960-04-01	16.3900
1960-05-01	18.4400
1960-06-01	14.3600
1960-07-01	19.0300
1960-08-01	16.6400
1960-09-01	14.5800
1960-10-01	16.7300
1960-11-01	15.4800
1960-12-01	11.0300
1961-01-01	9.61000
1961-02-01	8.55000
1961-03-01	12.9000
1961-04-01	13.2500
1961-05-01	13.1300
1961-06-01	11.9100
1961-07-01	13.3700
1961-08-01	18.9600
1961-09-01	12.3000
1961-10-01	10.5400
1961-11-01	14.3600
1961-12-01	13.9300
1962-01-01	10.5200
1962-02-01	11.4600
1962-03-01	16.9000
1962-04-01	16.3100
1962-05-01	17.5900
1962-06-01	13.8200
1962-07-01	15.2200
1962-08-01	20.1400
1962-09-01	11.8400
1962-10-01	16.4000
1962-11-01	13.7500
1962-12-01	11.9300
1963-01-01	10.5000
1963-02-01	12.9500
1963-03-01	15.0800
1963-04-01	13.8600
1963-05-01	20.4600
1963-06-01	19.1000
1963-07-01	16.5700
1963-08-01	21.3600
1963-09-01	15.2800
1963-10-01	19.2700
1963-11-01	15.0700
1963-12-01	11.6600