Month	Million Square Feet
1919-01-01	7.30000
1919-02-01	6.83000
1919-03-01	11.1700
1919-04-01	16.3800
1919-05-01	20.9100
1919-06-01	28.8700
1919-07-01	28.3200
1919-08-01	29.7500
1919-09-01	23.5400
1919-10-01	35.2600
1919-11-01	30.6200
1919-12-01	29.3300
1920-01-01	26.7200
1920-02-01	22.7300
1920-03-01	33.5300
1920-04-01	24.8700
1920-05-01	19.8500
1920-06-01	20.4100
1920-07-01	14.3400
1920-08-01	12.5900
1920-09-01	14.5600
1920-10-01	10.3300
1920-11-01	9.28000
1920-12-01	6.06000
1921-01-01	5.79000
1921-02-01	5.64000
1921-03-01	7.28000
1921-04-01	9.98000
1921-05-01	9.80000
1921-06-01	9.42000
1921-07-01	9.09000
1921-08-01	9.74000
1921-09-01	10.1400
1921-10-01	12.3100
1921-11-01	9.62000
1921-12-01	7.45000
1922-01-01	7.77000
1922-02-01	8.60000
1922-03-01	13.1900
1922-04-01	15.4900
1922-05-01	16.1300
1922-06-01	14.6500
1922-07-01	15.5700
1922-08-01	19.0300
1922-09-01	13.5100
1922-10-01	14.1200
1922-11-01	12.7100
1922-12-01	9.92000
1923-01-01	9.79000
1923-02-01	11.9600
1923-03-01	17.3600
1923-04-01	16.4000
1923-05-01	18.7300
1923-06-01	12.6500
1923-07-01	10.9200
1923-08-01	9.58000
1923-09-01	11.1800
1923-10-01	11.4600
1923-11-01	12.0100
1923-12-01	12.1500
1924-01-01	9.45000
1924-02-01	11.8100
1924-03-01	14.3100
1924-04-01	12.3300
1924-05-01	13.0300
1924-06-01	11.1000
1924-07-01	8.78000
1924-08-01	9.81000
1924-09-01	10.8300
1924-10-01	12.4600
1924-11-01	12.5800
1924-12-01	11.9700
1925-01-01	13.9200
1925-02-01	7.88000
1925-03-01	15.0000
1925-04-01	16.9200
1925-05-01	17.5000
1925-06-01	15.9800
1925-07-01	15.8500
1925-08-01	19.9200
1925-09-01	19.9700
1925-10-01	16.8800
1925-11-01	16.6100
1925-12-01	14.5100