Month	Million Square Feet
1956-01-01	29.2300
1956-02-01	31.6900
1956-03-01	44.2100
1956-04-01	45.5900
1956-05-01	37.5900
1956-06-01	37.8200
1956-07-01	40.6100
1956-08-01	39.2800
1956-09-01	36.0700
1956-10-01	33.3700
1956-11-01	33.0400
1956-12-01	27.9800
1957-01-01	36.2700
1957-02-01	32.1600
1957-03-01	39.3400
1957-04-01	33.8600
1957-05-01	39.4900
1957-06-01	43.1000
1957-07-01	38.5800
1957-08-01	36.0500
1957-09-01	31.5100
1957-10-01	33.4600
1957-11-01	30.0600
1957-12-01	26.8400
1958-01-01	27.7500
1958-02-01	23.0300
1958-03-01	30.5200
1958-04-01	27.8200
1958-05-01	31.5700
1958-06-01	27.0700
1958-07-01	34.6400
1958-08-01	38.1000
1958-09-01	30.9400
1958-10-01	35.7200
1958-11-01	28.3000
1958-12-01	23.8300
1959-01-01	28.1000
1959-02-01	24.4400
1959-03-01	35.8100
1959-04-01	44.4300
1959-05-01	42.4000
1959-06-01	36.2400
1959-07-01	43.2900
1959-08-01	38.2400
1959-09-01	39.9200
1959-10-01	44.7600
1959-11-01	33.1500
1959-12-01	32.3400
1960-01-01	31.9800
1960-02-01	27.1400
1960-03-01	37.3200
1960-04-01	41.0500
1960-05-01	43.3700
1960-06-01	40.3500
1960-07-01	44.1200
1960-08-01	45.9900
1960-09-01	40.9900
1960-10-01	43.5000
1960-11-01	37.5100
1960-12-01	32.0800
1961-01-01	29.6200
1961-02-01	26.6400
1961-03-01	38.5800
1961-04-01	37.7600
1961-05-01	39.7300
1961-06-01	36.9100
1961-07-01	40.5200
1961-08-01	46.5600
1961-09-01	40.7000
1961-10-01	36.8600
1961-11-01	40.2800
1961-12-01	35.0600
1962-01-01	31.5000
1962-02-01	32.0200
1962-03-01	46.5000
1962-04-01	43.2800
1962-05-01	51.4300
1962-06-01	43.5900
1962-07-01	43.8900
1962-08-01	50.6700
1962-09-01	41.9800
1962-10-01	44.7800
1962-11-01	40.7200
1962-12-01	35.7700
1963-01-01	36.0900
1963-02-01	34.0100
1963-03-01	40.0500
1963-04-01	40.0700
1963-05-01	54.3800
1963-06-01	54.9400
1963-07-01	49.1700
1963-08-01	53.9200
1963-09-01	44.7600
1963-10-01	54.8700
1963-11-01	41.8500
1963-12-01	37.8400