Month Million Square Feet 1925-01-01 5.27000 1925-02-01 7.82000 1925-03-01 10.3300 1925-04-01 10.5500 1925-05-01 10.6800 1925-06-01 15.2200 1925-07-01 14.3800 1925-08-01 13.3400 1925-09-01 12.0100 1925-10-01 8.08000 1925-11-01 6.92000 1925-12-01 7.38000 1926-01-01 5.64000 1926-02-01 6.12000 1926-03-01 9.13000 1926-04-01 10.3100 1926-05-01 11.8300 1926-06-01 11.0300 1926-07-01 10.5300 1926-08-01 11.3100 1926-09-01 9.84000 1926-10-01 8.22000 1926-11-01 9.31000 1926-12-01 7.51000 1927-01-01 4.85000 1927-02-01 6.75000 1927-03-01 11.9600 1927-04-01 9.71000 1927-05-01 12.3500 1927-06-01 13.1400 1927-07-01 11.7700 1927-08-01 12.6500 1927-09-01 10.4400 1927-10-01 9.77000 1927-11-01 10.1300 1927-12-01 7.79000 1928-01-01 7.20000 1928-02-01 6.86000 1928-03-01 11.5400 1928-04-01 10.6600 1928-05-01 13.0000 1928-06-01 14.1000 1928-07-01 12.2500 1928-08-01 11.5600 1928-09-01 12.0700 1928-10-01 11.0800 1928-11-01 9.67000 1928-12-01 8.80000 1929-01-01 5.52000 1929-02-01 6.17000 1929-03-01 11.6600 1929-04-01 9.98000 1929-05-01 12.5600 1929-06-01 11.7400 1929-07-01 12.6400 1929-08-01 11.1200 1929-09-01 11.9700 1929-10-01 13.3300 1929-11-01 8.46000 1929-12-01 6.60000 1930-01-01 6.02000 1930-02-01 7.58000 1930-03-01 13.2200 1930-04-01 13.5800 1930-05-01 11.4400 1930-06-01 12.1600 1930-07-01 12.7900 1930-08-01 9.90000 1930-09-01 8.67000 1930-10-01 7.24000 1930-11-01 6.96000 1930-12-01 7.82000 1931-01-01 5.59000 1931-02-01 6.14000 1931-03-01 8.24000 1931-04-01 8.90000 1931-05-01 8.83000 1931-06-01 8.33000 1931-07-01 9.85000 1931-08-01 11.1700 1931-09-01 9.99000 1931-10-01 5.08000 1931-11-01 5.55000 1931-12-01 5.77000 1932-01-01 2.70000 1932-02-01 3.24000 1932-03-01 4.52000 1932-04-01 3.48000 1932-05-01 6.04000 1932-06-01 3.48000 1932-07-01 6.03000 1932-08-01 4.17000 1932-09-01 3.73000 1932-10-01 2.67000 1932-11-01 3.93000 1932-12-01 1.74000 1933-01-01 2.95000 1933-02-01 2.06000 1933-03-01 2.56000 1933-04-01 1.92000 1933-05-01 2.38000 1933-06-01 2.09000 1933-07-01 1.58000 1933-08-01 1.30000 1933-09-01 2.32000 1933-10-01 4.19000 1933-11-01 2.24000 1933-12-01 2.72000 1934-01-01 2.99000 1934-02-01 2.26000 1934-03-01 3.54000 1934-04-01 3.54000 1934-05-01 3.14000 1934-06-01 3.70000 1934-07-01 2.86000 1934-08-01 4.80000 1934-09-01 3.64000 1934-10-01 2.92000 1934-11-01 3.44000 1934-12-01 1.86000 1935-01-01 1.96000 1935-02-01 2.10000 1935-03-01 3.66000 1935-04-01 3.12000 1935-05-01 3.46000 1935-06-01 4.04000 1935-07-01 2.48000 1935-08-01 4.22000 1935-09-01 3.89000 1935-10-01 4.23000 1935-11-01 6.20000 1935-12-01 15.7600 1936-01-01 11.2200 1936-02-01 6.43000 1936-03-01 7.33000 1936-04-01 8.29000 1936-05-01 8.41000 1936-06-01 7.01000 1936-07-01 7.47000 1936-08-01 5.96000 1936-09-01 4.65000 1936-10-01 4.95000 1936-11-01 5.25000 1936-12-01 4.46000 1937-01-01 5.04000 1937-02-01 3.82000 1937-03-01 5.34000 1937-04-01 5.62000 1937-05-01 6.08000 1937-06-01 8.46000 1937-07-01 6.92000 1937-08-01 6.98000 1937-09-01 4.78000 1937-10-01 5.33000 1937-11-01 6.80000 1937-12-01 10.4600 1938-01-01 5.38000 1938-02-01 4.45000 1938-03-01 6.84000 1938-04-01 7.02000 1938-05-01 7.45000 1938-06-01 7.85000 1938-07-01 4.50000 1938-08-01 7.63000 1938-09-01 10.3600 1938-10-01 14.3000 1938-11-01 14.7900 1938-12-01 19.6500 1939-01-01 8.58000 1939-02-01 7.24000 1939-03-01 9.45000 1939-04-01 8.53000 1939-05-01 5.01000 1939-06-01 6.64000 1939-07-01 6.77000 1939-08-01 5.15000 1939-09-01 5.66000 1939-10-01 5.12000 1939-11-01 5.42000 1939-12-01 3.49000 1940-01-01 3.17000 1940-02-01 5.41000 1940-03-01 4.25000 1940-04-01 6.00000 1940-05-01 5.31000 1940-06-01 5.69000 1940-07-01 6.69000 1940-08-01 6.59000 1940-09-01 4.39000 1940-10-01 7.55000 1940-11-01 4.85000 1940-12-01 7.05000 1941-01-01 4.46000 1941-02-01 4.00000 1941-03-01 5.93000 1941-04-01 4.75000 1941-05-01 7.48000 1941-06-01 7.08000 1941-07-01 7.88000 1941-08-01 8.00000 1941-09-01 4.29000 1941-10-01 12.5200 1941-11-01 5.44000 1941-12-01 2.93000 1942-01-01 3.16000 1942-02-01 6.69000 1942-03-01 5.48000 1942-04-01 5.64000 1942-05-01 5.99000 1942-06-01 15.6200 1942-07-01 11.2100 1942-08-01 10.7900 1942-09-01 7.50000 1942-10-01 9.04000 1942-11-01 12.0100 1942-12-01 15.3100 1943-01-01 5.78000 1943-02-01 6.57000 1943-03-01 4.66000 1943-04-01 4.98000 1943-05-01 4.84000 1943-06-01 3.88000 1943-07-01 2.32000 1943-08-01 3.16000 1943-09-01 2.76000 1943-10-01 3.50000 1943-11-01 2.76000 1943-12-01 4.09000 1944-01-01 2.25000 1944-02-01 1.58000 1944-03-01 1.62000 1944-04-01 2.31000 1944-05-01 1.67000 1944-06-01 2.90000 1944-07-01 2.76000 1944-08-01 1.62000 1944-09-01 2.27000 1944-10-01 1.59000 1944-11-01 2.38000 1944-12-01 1.94000 1945-01-01 2.03000 1945-02-01 1.70000 1945-03-01 2.40000 1945-04-01 2.83000 1945-05-01 1.86000 1945-06-01 3.04000 1945-07-01 3.68000 1945-08-01 3.70000 1945-09-01 3.55000 1945-10-01 4.41000 1945-11-01 3.32000 1945-12-01 3.32000 1946-01-01 4.38000 1946-02-01 5.43000 1946-03-01 4.93000 1946-04-01 6.37000 1946-05-01 4.94000 1946-06-01 5.21000 1946-07-01 8.13000 1946-08-01 3.60000 1946-09-01 4.32000 1946-10-01 3.95000 1946-11-01 4.31000 1946-12-01 3.30000 1947-01-01 5.26000 1947-02-01 4.24000 1947-03-01 4.72000 1947-04-01 5.08000 1947-05-01 8.95000 1947-06-01 7.80000 1947-07-01 7.87000 1947-08-01 10.4800 1947-09-01 9.79000 1947-10-01 8.77000 1947-11-01 8.50000 1947-12-01 9.28000 1948-01-01 10.2000 1948-02-01 11.2300 1948-03-01 8.66000 1948-04-01 13.3900 1948-05-01 16.7000 1948-06-01 13.6500 1948-07-01 18.1500 1948-08-01 12.6200 1948-09-01 11.0700 1948-10-01 12.6500 1948-11-01 10.6400 1948-12-01 13.2600 1949-01-01 9.49000 1949-02-01 10.0600 1949-03-01 12.7900 1949-04-01 15.0900 1949-05-01 15.0400 1949-06-01 17.6100 1949-07-01 18.5400 1949-08-01 13.9400 1949-09-01 16.6100 1949-10-01 17.2200 1949-11-01 13.2900 1949-12-01 12.6300 1950-01-01 10.5300 1950-02-01 13.9300 1950-03-01 19.8700 1950-04-01 19.0000 1950-05-01 17.7600 1950-06-01 22.2000 1950-07-01 22.2500 1950-08-01 20.9200 1950-09-01 20.7400 1950-10-01 15.8300 1950-11-01 17.6000 1950-12-01 15.5700 1951-01-01 14.6900 1951-02-01 14.1100 1951-03-01 19.6600 1951-04-01 15.9800 1951-05-01 21.1500 1951-06-01 17.2500 1951-07-01 18.1000 1951-08-01 15.2800 1951-09-01 13.2700 1951-10-01 14.4200 1951-11-01 12.4400 1951-12-01 17.6000 1952-01-01 11.5000 1952-02-01 10.3400 1952-03-01 14.5000 1952-04-01 16.6200 1952-05-01 19.0500 1952-06-01 15.3800 1952-07-01 16.4700 1952-08-01 16.4900 1952-09-01 10.5900 1952-10-01 15.1400 1952-11-01 16.2500 1952-12-01 18.7000 1953-01-01 13.4800 1953-02-01 12.2800 1953-03-01 15.7900 1953-04-01 17.3200 1953-05-01 18.8200 1953-06-01 15.7200 1953-07-01 20.2000 1953-08-01 18.0500 1953-09-01 15.9500 1953-10-01 21.5900 1953-11-01 16.0600 1953-12-01 18.9000 1954-01-01 15.3800 1954-02-01 17.0700 1954-03-01 20.0900 1954-04-01 20.1800 1954-05-01 23.3800 1954-06-01 22.1900 1954-07-01 23.8700 1954-08-01 20.4900 1954-09-01 22.3000 1954-10-01 20.3000 1954-11-01 18.5300 1954-12-01 25.6900 1955-01-01 18.7400 1955-02-01 16.7500 1955-03-01 24.6600 1955-04-01 23.7300 1955-05-01 22.4400 1955-06-01 25.4800 1955-07-01 26.8200 1955-08-01 18.5800 1955-09-01 17.5800 1955-10-01 17.7100 1955-11-01 16.7300 1955-12-01 22.7900 1956-01-01 21.0800 1956-02-01 16.3400 1956-03-01 24.5200 1956-04-01 24.7100 1956-05-01 25.1200 1956-06-01 21.1400 1956-07-01 24.1500 1956-08-01 23.2200 1956-09-01 21.2300 1956-10-01 21.3700 1956-11-01 21.7700 1956-12-01 19.6000