Month Million Square Feet 1925-01-01 3.34000 1925-02-01 5.27000 1925-03-01 7.36000 1925-04-01 6.96000 1925-05-01 6.92000 1925-06-01 11.4000 1925-07-01 9.79000 1925-08-01 8.20000 1925-09-01 9.04000 1925-10-01 5.47000 1925-11-01 4.55000 1925-12-01 5.32000 1926-01-01 3.93000 1926-02-01 4.52000 1926-03-01 5.59000 1926-04-01 7.04000 1926-05-01 8.52000 1926-06-01 8.10000 1926-07-01 7.56000 1926-08-01 8.31000 1926-09-01 6.69000 1926-10-01 5.36000 1926-11-01 6.46000 1926-12-01 5.14000 1927-01-01 3.70000 1927-02-01 4.70000 1927-03-01 7.81000 1927-04-01 6.52000 1927-05-01 8.09000 1927-06-01 9.25000 1927-07-01 8.24000 1927-08-01 9.43000 1927-09-01 6.78000 1927-10-01 6.81000 1927-11-01 7.42000 1927-12-01 5.47000 1928-01-01 5.54000 1928-02-01 4.89000 1928-03-01 8.05000 1928-04-01 7.41000 1928-05-01 9.37000 1928-06-01 10.3000 1928-07-01 8.60000 1928-08-01 8.37000 1928-09-01 9.73000 1928-10-01 7.76000 1928-11-01 7.07000 1928-12-01 7.20000 1929-01-01 4.37000 1929-02-01 4.30000 1929-03-01 9.50000 1929-04-01 6.82000 1929-05-01 9.61000 1929-06-01 9.32000 1929-07-01 9.66000 1929-08-01 8.34000 1929-09-01 9.70000 1929-10-01 9.67000 1929-11-01 6.87000 1929-12-01 4.59000 1930-01-01 4.29000 1930-02-01 6.03000 1930-03-01 10.8100 1930-04-01 10.5400 1930-05-01 9.21000 1930-06-01 9.75000 1930-07-01 11.0600 1930-08-01 7.78000 1930-09-01 7.20000 1930-10-01 5.81000 1930-11-01 5.74000 1930-12-01 6.47000 1931-01-01 4.35000 1931-02-01 5.20000 1931-03-01 7.21000 1931-04-01 7.25000 1931-05-01 6.87000 1931-06-01 6.53000 1931-07-01 8.37000 1931-08-01 9.85000 1931-09-01 8.54000 1931-10-01 4.18000 1931-11-01 4.75000 1931-12-01 5.40000 1932-01-01 2.43000 1932-02-01 2.80000 1932-03-01 3.59000 1932-04-01 2.65000 1932-05-01 5.06000 1932-06-01 2.92000 1932-07-01 4.97000 1932-08-01 3.57000 1932-09-01 2.95000 1932-10-01 2.06000 1932-11-01 3.31000 1932-12-01 1.44000 1933-01-01 2.56000 1933-02-01 1.64000 1933-03-01 1.51000 1933-04-01 0.970000 1933-05-01 1.57000 1933-06-01 1.41000 1933-07-01 0.990000 1933-08-01 0.800000 1933-09-01 1.86000 1933-10-01 3.67000 1933-11-01 1.86000 1933-12-01 2.19000 1934-01-01 2.40000 1934-02-01 1.83000 1934-03-01 2.40000 1934-04-01 2.61000 1934-05-01 2.44000 1934-06-01 3.09000 1934-07-01 2.29000 1934-08-01 4.06000 1934-09-01 3.20000 1934-10-01 2.53000 1934-11-01 3.08000 1934-12-01 1.56000 1935-01-01 1.70000 1935-02-01 1.88000 1935-03-01 3.23000 1935-04-01 2.09000 1935-05-01 2.78000 1935-06-01 3.41000 1935-07-01 1.78000 1935-08-01 3.66000 1935-09-01 3.18000 1935-10-01 3.49000 1935-11-01 5.40000 1935-12-01 14.4200 1936-01-01 10.2300 1936-02-01 5.75000 1936-03-01 6.15000 1936-04-01 6.56000 1936-05-01 6.88000 1936-06-01 5.86000 1936-07-01 6.47000 1936-08-01 4.95000 1936-09-01 3.74000 1936-10-01 4.22000 1936-11-01 4.07000 1936-12-01 3.51000 1937-01-01 4.41000 1937-02-01 3.15000 1937-03-01 4.26000 1937-04-01 4.38000 1937-05-01 5.16000 1937-06-01 7.34000 1937-07-01 5.83000 1937-08-01 5.17000 1937-09-01 3.74000 1937-10-01 3.99000 1937-11-01 5.38000 1937-12-01 9.55000 1938-01-01 4.80000 1938-02-01 3.58000 1938-03-01 5.78000 1938-04-01 5.87000 1938-05-01 4.30000 1938-06-01 5.74000 1938-07-01 3.26000 1938-08-01 6.16000 1938-09-01 8.80000 1938-10-01 13.0200 1938-11-01 13.8700 1938-12-01 18.6400 1939-01-01 7.71000 1939-02-01 6.60000 1939-03-01 8.31000 1939-04-01 7.21000 1939-05-01 3.69000 1939-06-01 5.16000 1939-07-01 4.74000 1939-08-01 4.12000 1939-09-01 4.56000 1939-10-01 3.98000 1939-11-01 4.69000 1939-12-01 2.70000 1940-01-01 2.78000 1940-02-01 4.76000 1940-03-01 3.27000 1940-04-01 4.92000 1940-05-01 3.79000 1940-06-01 3.99000 1940-07-01 5.07000 1940-08-01 4.88000 1940-09-01 3.16000 1940-10-01 6.31000 1940-11-01 4.06000 1940-12-01 6.22000 1941-01-01 3.78000 1941-02-01 3.06000 1941-03-01 4.91000 1941-04-01 3.39000 1941-05-01 5.93000 1941-06-01 4.97000 1941-07-01 6.08000 1941-08-01 5.93000 1941-09-01 3.15000 1941-10-01 9.88000 1941-11-01 3.64000 1941-12-01 2.12000 1942-01-01 2.40000 1942-02-01 6.12000 1942-03-01 3.83000 1942-04-01 4.96000 1942-05-01 4.92000 1942-06-01 12.6400 1942-07-01 9.29000 1942-08-01 9.95000 1942-09-01 4.77000 1942-10-01 6.12000 1942-11-01 8.95000 1942-12-01 11.3500 1943-01-01 3.88000 1943-02-01 4.70000 1943-03-01 3.97000 1943-04-01 4.18000 1943-05-01 3.66000 1943-06-01 2.80000 1943-07-01 1.79000 1943-08-01 1.91000 1943-09-01 2.24000 1943-10-01 2.84000 1943-11-01 2.31000 1943-12-01 3.67000 1944-01-01 1.79000 1944-02-01 1.26000 1944-03-01 1.28000 1944-04-01 1.78000 1944-05-01 1.37000 1944-06-01 2.65000 1944-07-01 2.33000 1944-08-01 1.24000 1944-09-01 1.91000 1944-10-01 1.30000 1944-11-01 2.17000 1944-12-01 1.61000 1945-01-01 1.65000 1945-02-01 1.42000 1945-03-01 2.01000 1945-04-01 2.31000 1945-05-01 1.40000 1945-06-01 2.48000 1945-07-01 3.02000 1945-08-01 2.82000 1945-09-01 2.74000 1945-10-01 3.18000 1945-11-01 1.74000 1945-12-01 2.25000 1946-01-01 3.18000 1946-02-01 3.96000 1946-03-01 2.83000 1946-04-01 5.23000 1946-05-01 3.57000 1946-06-01 3.64000 1946-07-01 7.20000 1946-08-01 2.34000 1946-09-01 3.29000 1946-10-01 3.22000 1946-11-01 3.76000 1946-12-01 2.66000 1947-01-01 4.55000 1947-02-01 3.63000 1947-03-01 3.25000 1947-04-01 3.82000 1947-05-01 7.29000 1947-06-01 6.04000 1947-07-01 5.78000 1947-08-01 7.98000 1947-09-01 7.62000 1947-10-01 6.83000 1947-11-01 6.27000 1947-12-01 7.80000 1948-01-01 8.98000 1948-02-01 9.40000 1948-03-01 7.04000 1948-04-01 9.95000 1948-05-01 13.1100 1948-06-01 11.0800 1948-07-01 14.2600 1948-08-01 8.83000 1948-09-01 7.37000 1948-10-01 9.51000 1948-11-01 8.64000 1948-12-01 11.5700 1949-01-01 7.49000 1949-02-01 8.31000 1949-03-01 9.90000 1949-04-01 11.5100 1949-05-01 11.7100 1949-06-01 14.1200 1949-07-01 14.8600 1949-08-01 10.7700 1949-09-01 12.6900 1949-10-01 14.0100 1949-11-01 11.1300 1949-12-01 10.1900 1950-01-01 8.41000 1950-02-01 11.6700 1950-03-01 15.7300 1950-04-01 14.7000 1950-05-01 13.8200 1950-06-01 18.0500 1950-07-01 18.3200 1950-08-01 16.2900 1950-09-01 16.7000 1950-10-01 12.0300 1950-11-01 14.6600 1950-12-01 13.0600 1951-01-01 12.0800 1951-02-01 11.7800 1951-03-01 16.2700 1951-04-01 12.6800 1951-05-01 17.7100 1951-06-01 14.2800 1951-07-01 15.5300 1951-08-01 13.2900 1951-09-01 10.7400 1951-10-01 12.2000 1951-11-01 10.7700 1951-12-01 15.8200 1952-01-01 10.2500 1952-02-01 9.32000 1952-03-01 12.6700 1952-04-01 13.4800 1952-05-01 15.7600 1952-06-01 12.2700 1952-07-01 13.5800 1952-08-01 13.8200 1952-09-01 8.60000 1952-10-01 12.3800 1952-11-01 13.9400 1952-12-01 16.2200 1953-01-01 11.4500 1953-02-01 10.3400 1953-03-01 13.2400 1953-04-01 13.2800 1953-05-01 15.2900 1953-06-01 12.8400 1953-07-01 15.5200 1953-08-01 14.6800 1953-09-01 12.5100 1953-10-01 17.8800 1953-11-01 13.1800 1953-12-01 16.0400 1954-01-01 13.0700 1954-02-01 14.5900 1954-03-01 16.9400 1954-04-01 16.2500 1954-05-01 17.9200 1954-06-01 18.1300 1954-07-01 19.5800 1954-08-01 16.3800 1954-09-01 18.6600 1954-10-01 16.2900 1954-11-01 14.6700 1954-12-01 20.7700 1955-01-01 15.1400 1955-02-01 13.4400 1955-03-01 19.9600 1955-04-01 19.1600 1955-05-01 17.7600 1955-06-01 20.3800 1955-07-01 21.7400 1955-08-01 14.3400 1955-09-01 13.4000 1955-10-01 14.2900 1955-11-01 13.2000 1955-12-01 19.3700 1956-01-01 17.8100 1956-02-01 13.1100 1956-03-01 20.2200 1956-04-01 19.4700 1956-05-01 19.0400 1956-06-01 16.2800 1956-07-01 18.6300 1956-08-01 17.9900 1956-09-01 16.6900 1956-10-01 16.3800 1956-11-01 17.7900 1956-12-01 16.0100