Month Million Square Feet 1925-01-01 4.45000 1925-02-01 3.34000 1925-03-01 4.80000 1925-04-01 6.29000 1925-05-01 5.27000 1925-06-01 4.09000 1925-07-01 5.58000 1925-08-01 4.86000 1925-09-01 8.63000 1925-10-01 6.77000 1925-11-01 7.30000 1925-12-01 5.53000 1926-01-01 5.95000 1926-02-01 5.19000 1926-03-01 7.10000 1926-04-01 5.15000 1926-05-01 6.74000 1926-06-01 5.43000 1926-07-01 8.83000 1926-08-01 7.04000 1926-09-01 6.06000 1926-10-01 6.47000 1926-11-01 6.25000 1926-12-01 5.49000 1927-01-01 3.68000 1927-02-01 4.14000 1927-03-01 6.29000 1927-04-01 9.58000 1927-05-01 5.80000 1927-06-01 5.51000 1927-07-01 5.73000 1927-08-01 5.97000 1927-09-01 5.35000 1927-10-01 5.30000 1927-11-01 6.26000 1927-12-01 4.53000 1928-01-01 5.04000 1928-02-01 5.69000 1928-03-01 6.76000 1928-04-01 10.7700 1928-05-01 6.08000 1928-06-01 10.6200 1928-07-01 6.21000 1928-08-01 8.47000 1928-09-01 10.2900 1928-10-01 9.91000 1928-11-01 6.86000 1928-12-01 6.21000 1929-01-01 6.99000 1929-02-01 8.05000 1929-03-01 9.37000 1929-04-01 6.80000 1929-05-01 10.5200 1929-06-01 8.23000 1929-07-01 9.54000 1929-08-01 10.0100 1929-09-01 7.08000 1929-10-01 8.83000 1929-11-01 6.85000 1929-12-01 13.2400 1930-01-01 2.49000 1930-02-01 2.87000 1930-03-01 5.97000 1930-04-01 4.60000 1930-05-01 7.52000 1930-06-01 3.72000 1930-07-01 5.07000 1930-08-01 3.61000 1930-09-01 5.43000 1930-10-01 2.61000 1930-11-01 2.06000 1930-12-01 2.07000 1931-01-01 1.62000 1931-02-01 1.50000 1931-03-01 1.77000 1931-04-01 2.46000 1931-05-01 2.57000 1931-06-01 2.03000 1931-07-01 2.21000 1931-08-01 1.07000 1931-09-01 1.54000 1931-10-01 1.78000 1931-11-01 1.12000 1931-12-01 0.440000 1932-01-01 0.870000 1932-02-01 0.930000 1932-03-01 1.03000 1932-04-01 0.890000 1932-05-01 0.560000 1932-06-01 0.600000 1932-07-01 0.690000 1932-08-01 0.890000 1932-09-01 0.900000 1932-10-01 0.660000 1932-11-01 0.470000 1932-12-01 0.550000 1933-01-01 0.430000 1933-02-01 0.720000 1933-03-01 0.930000 1933-04-01 1.38000 1933-05-01 1.79000 1933-06-01 2.12000 1933-07-01 2.66000 1933-08-01 2.59000 1933-09-01 2.33000 1933-10-01 2.13000 1933-11-01 0.970000 1933-12-01 0.920000 1934-01-01 1.18000 1934-02-01 0.820000 1934-03-01 1.67000 1934-04-01 1.74000 1934-05-01 1.24000 1934-06-01 1.08000 1934-07-01 3.06000 1934-08-01 1.50000 1934-09-01 1.20000 1934-10-01 2.12000 1934-11-01 1.00000 1934-12-01 0.960000 1935-01-01 1.16000 1935-02-01 1.01000 1935-03-01 1.11000 1935-04-01 1.22000 1935-05-01 2.10000 1935-06-01 1.97000 1935-07-01 2.66000 1935-08-01 1.97000 1935-09-01 1.23000 1935-10-01 2.32000 1935-11-01 1.83000 1935-12-01 2.05000 1936-01-01 1.68000 1936-02-01 2.38000 1936-03-01 3.32000 1936-04-01 3.48000 1936-05-01 2.58000 1936-06-01 2.92000 1936-07-01 3.62000 1936-08-01 3.96000 1936-09-01 3.83000 1936-10-01 3.85000 1936-11-01 3.51000 1936-12-01 5.16000 1937-01-01 5.08000 1937-02-01 2.99000 1937-03-01 4.84000 1937-04-01 6.02000 1937-05-01 4.56000 1937-06-01 7.49000 1937-07-01 10.2600 1937-08-01 8.17000 1937-09-01 3.54000 1937-10-01 2.52000 1937-11-01 2.48000 1937-12-01 2.86000 1938-01-01 1.18000 1938-02-01 1.12000 1938-03-01 2.71000 1938-04-01 1.58000 1938-05-01 1.96000 1938-06-01 2.22000 1938-07-01 2.15000 1938-08-01 2.79000 1938-09-01 1.58000 1938-10-01 3.35000 1938-11-01 2.78000 1938-12-01 1.83000 1939-01-01 1.95000 1939-02-01 2.82000 1939-03-01 4.13000 1939-04-01 3.34000 1939-05-01 3.21000 1939-06-01 3.41000 1939-07-01 5.40000 1939-08-01 2.53000 1939-09-01 4.46000 1939-10-01 4.67000 1939-11-01 4.91000 1939-12-01 3.43000 1940-01-01 2.82000 1940-02-01 2.78000 1940-03-01 5.36000 1940-04-01 5.65000 1940-05-01 5.29000 1940-06-01 4.28000 1940-07-01 6.92000 1940-08-01 8.14000 1940-09-01 8.16000 1940-10-01 12.7300 1940-11-01 17.5200 1940-12-01 15.1300 1941-01-01 11.1300 1941-02-01 9.37000 1941-03-01 14.3900 1941-04-01 13.8500 1941-05-01 15.9600 1941-06-01 11.6700 1941-07-01 14.0600 1941-08-01 27.7800 1941-09-01 20.8900 1941-10-01 18.1300 1941-11-01 17.1400 1941-12-01 13.5600 1942-01-01 12.6000 1942-02-01 15.1000 1942-03-01 17.7200 1942-04-01 29.3600 1942-05-01 39.2300 1942-06-01 57.5600 1942-07-01 65.0800 1942-08-01 53.1500 1942-09-01 76.6600 1942-10-01 46.4900 1942-11-01 19.0800 1942-12-01 14.0200 1943-01-01 10.3900 1943-02-01 13.3600 1943-03-01 10.0900 1943-04-01 7.26000 1943-05-01 4.16000 1943-06-01 8.69000 1943-07-01 5.57000 1943-08-01 18.7000 1943-09-01 3.87000 1943-10-01 5.52000 1943-11-01 6.59000 1943-12-01 11.6000 1944-01-01 5.80000 1944-02-01 5.71000 1944-03-01 6.11000 1944-04-01 6.42000 1944-05-01 3.75000 1944-06-01 4.09000 1944-07-01 7.27000 1944-08-01 6.80000 1944-09-01 9.26000 1944-10-01 6.66000 1944-11-01 9.67000 1944-12-01 12.8100 1945-01-01 6.86000 1945-02-01 8.00000 1945-03-01 18.5500 1945-04-01 11.1700 1945-05-01 7.38000 1945-06-01 5.06000 1945-07-01 11.2200 1945-08-01 13.0500 1945-09-01 18.7500 1945-10-01 17.3400 1945-11-01 21.2100 1945-12-01 19.6200 1946-01-01 19.5100 1946-02-01 18.8200 1946-03-01 23.3400 1946-04-01 20.4900 1946-05-01 25.9100 1946-06-01 25.4400 1946-07-01 22.3200 1946-08-01 19.4900 1946-09-01 13.2700 1946-10-01 22.6800 1946-11-01 12.7300 1946-12-01 11.2300 1947-01-01 15.4000 1947-02-01 11.1700 1947-03-01 10.8700 1947-04-01 10.9400 1947-05-01 11.0400 1947-06-01 10.9600 1947-07-01 12.9000 1947-08-01 11.1600 1947-09-01 11.8500 1947-10-01 13.3400 1947-11-01 8.56000 1947-12-01 14.7900 1948-01-01 7.72000 1948-02-01 9.55000 1948-03-01 7.52000 1948-04-01 9.88000 1948-05-01 11.1000 1948-06-01 8.95000 1948-07-01 13.5400 1948-08-01 10.6500 1948-09-01 7.16000 1948-10-01 9.45000 1948-11-01 6.63000 1948-12-01 7.55000 1949-01-01 5.60000 1949-02-01 4.39000 1949-03-01 4.72000 1949-04-01 5.62000 1949-05-01 5.40000 1949-06-01 5.41000 1949-07-01 5.02000 1949-08-01 3.87000 1949-09-01 4.46000 1949-10-01 5.29000 1949-11-01 4.54000 1949-12-01 6.81000 1950-01-01 4.73000 1950-02-01 3.83000 1950-03-01 6.69000 1950-04-01 10.9800 1950-05-01 10.0900 1950-06-01 9.87000 1950-07-01 9.37000 1950-08-01 13.2900 1950-09-01 10.8200 1950-10-01 12.9300 1950-11-01 11.0700 1950-12-01 11.1900 1951-01-01 14.4400 1951-02-01 12.7400 1951-03-01 13.1500 1951-04-01 14.4300 1951-05-01 13.5800 1951-06-01 13.3000 1951-07-01 11.4700 1951-08-01 12.3800 1951-09-01 11.1900 1951-10-01 8.23000 1951-11-01 6.76000 1951-12-01 16.5600 1952-01-01 6.28000 1952-02-01 6.00000 1952-03-01 6.81000 1952-04-01 10.8100 1952-05-01 7.61000 1952-06-01 11.8500 1952-07-01 10.6200 1952-08-01 9.64000 1952-09-01 8.26000 1952-10-01 9.75000 1952-11-01 9.76000 1952-12-01 17.4400 1953-01-01 7.34000 1953-02-01 8.08000 1953-03-01 7.24000 1953-04-01 11.2700 1953-05-01 10.3500 1953-06-01 6.11000 1953-07-01 12.2800 1953-08-01 7.88000 1953-09-01 9.69000 1953-10-01 12.5800 1953-11-01 12.4800 1953-12-01 6.39000 1954-01-01 7.89000 1954-02-01 5.38000 1954-03-01 6.68000 1954-04-01 9.02000 1954-05-01 8.60000 1954-06-01 9.38000 1954-07-01 10.3200 1954-08-01 8.18000 1954-09-01 9.36000 1954-10-01 11.1700 1954-11-01 7.04000 1954-12-01 7.19000 1955-01-01 6.41000 1955-02-01 10.2400 1955-03-01 8.85000 1955-04-01 11.1100 1955-05-01 9.86000 1955-06-01 9.55000 1955-07-01 11.7100 1955-08-01 10.3800 1955-09-01 13.5000 1955-10-01 13.3300 1955-11-01 10.0600 1955-12-01 9.80000 1956-01-01 11.0800 1956-02-01 12.0700 1956-03-01 16.5300 1956-04-01 14.6700 1956-05-01 13.0900 1956-06-01 12.1600 1956-07-01 11.4800 1956-08-01 12.2500 1956-09-01 12.3500 1956-10-01 10.6500 1956-11-01 10.4100 1956-12-01 9.81000