Month Million Square Feet 1925-01-01 16.5500 1925-02-01 11.8200 1925-03-01 18.3200 1925-04-01 20.7800 1925-05-01 20.9400 1925-06-01 20.0600 1925-07-01 20.9400 1925-08-01 24.3200 1925-09-01 24.0200 1925-10-01 21.2500 1925-11-01 19.6800 1925-12-01 20.3700 1926-01-01 18.8600 1926-02-01 15.3700 1926-03-01 25.1700 1926-04-01 21.6800 1926-05-01 21.1800 1926-06-01 19.0700 1926-07-01 20.8700 1926-08-01 21.9700 1926-09-01 22.2800 1926-10-01 19.5900 1926-11-01 17.2500 1926-12-01 17.4600 1927-01-01 16.2300 1927-02-01 14.9400 1927-03-01 24.6000 1927-04-01 23.6400 1927-05-01 20.3300 1927-06-01 20.3100 1927-07-01 19.0900 1927-08-01 18.4700 1927-09-01 16.5900 1927-10-01 18.6900 1927-11-01 14.9600 1927-12-01 14.5900 1928-01-01 17.0100 1928-02-01 17.2300 1928-03-01 18.9300 1928-04-01 26.2100 1928-05-01 21.6500 1928-06-01 25.9800 1928-07-01 24.6800 1928-08-01 21.9800 1928-09-01 22.5500 1928-10-01 24.5500 1928-11-01 20.8500 1928-12-01 18.0300 1929-01-01 22.5200 1929-02-01 20.0300 1929-03-01 23.1400 1929-04-01 22.6700 1929-05-01 27.5500 1929-06-01 22.5200 1929-07-01 24.4700 1929-08-01 24.8200 1929-09-01 20.9400 1929-10-01 22.2300 1929-11-01 20.6300 1929-12-01 18.7600 1930-01-01 11.2900 1930-02-01 13.6700 1930-03-01 19.0600 1930-04-01 15.6300 1930-05-01 17.7400 1930-06-01 13.3600 1930-07-01 12.6000 1930-08-01 11.7200 1930-09-01 11.3500 1930-10-01 9.57000 1930-11-01 6.84000 1930-12-01 5.84000 1931-01-01 6.18000 1931-02-01 5.31000 1931-03-01 7.04000 1931-04-01 6.95000 1931-05-01 7.74000 1931-06-01 7.13000 1931-07-01 6.53000 1931-08-01 4.51000 1931-09-01 6.58000 1931-10-01 10.0700 1931-11-01 3.66000 1931-12-01 2.38000 1932-01-01 2.68000 1932-02-01 2.81000 1932-03-01 3.68000 1932-04-01 3.02000 1932-05-01 2.86000 1932-06-01 2.92000 1932-07-01 2.64000 1932-08-01 3.94000 1932-09-01 2.99000 1932-10-01 2.24000 1932-11-01 2.10000 1932-12-01 1.58000 1933-01-01 1.51000 1933-02-01 2.03000 1933-03-01 2.45000 1933-04-01 3.05000 1933-05-01 4.15000 1933-06-01 4.96000 1933-07-01 5.35000 1933-08-01 5.03000 1933-09-01 4.15000 1933-10-01 4.14000 1933-11-01 2.81000 1933-12-01 2.47000 1934-01-01 2.61000 1934-02-01 2.01000 1934-03-01 4.05000 1934-04-01 4.44000 1934-05-01 4.95000 1934-06-01 3.43000 1934-07-01 5.42000 1934-08-01 4.12000 1934-09-01 3.88000 1934-10-01 4.96000 1934-11-01 3.81000 1934-12-01 3.08000 1935-01-01 3.66000 1935-02-01 2.89000 1935-03-01 3.31000 1935-04-01 4.63000 1935-05-01 5.69000 1935-06-01 5.03000 1935-07-01 5.80000 1935-08-01 5.41000 1935-09-01 4.71000 1935-10-01 6.58000 1935-11-01 5.48000 1935-12-01 4.92000 1936-01-01 4.82000 1936-02-01 4.96000 1936-03-01 7.72000 1936-04-01 9.03000 1936-05-01 7.22000 1936-06-01 8.90000 1936-07-01 10.0700 1936-08-01 9.54000 1936-09-01 8.99000 1936-10-01 9.41000 1936-11-01 9.37000 1936-12-01 9.91000 1937-01-01 9.62000 1937-02-01 6.88000 1937-03-01 11.2400 1937-04-01 12.7800 1937-05-01 10.5600 1937-06-01 13.2600 1937-07-01 17.5900 1937-08-01 14.1700 1937-09-01 9.72000 1937-10-01 8.24000 1937-11-01 6.89000 1937-12-01 6.17000 1938-01-01 4.04000 1938-02-01 3.77000 1938-03-01 6.39000 1938-04-01 6.26000 1938-05-01 5.91000 1938-06-01 6.18000 1938-07-01 6.66000 1938-08-01 6.69000 1938-09-01 4.59000 1938-10-01 8.20000 1938-11-01 6.08000 1938-12-01 4.98000 1939-01-01 5.50000 1939-02-01 5.32000 1939-03-01 7.71000 1939-04-01 7.72000 1939-05-01 7.16000 1939-06-01 8.19000 1939-07-01 10.4100 1939-08-01 6.59000 1939-09-01 10.3800 1939-10-01 9.79000 1939-11-01 9.45000 1939-12-01 7.66000 1940-01-01 5.64000 1940-02-01 6.54000 1940-03-01 9.69000 1940-04-01 10.2600 1940-05-01 10.8100 1940-06-01 10.9500 1940-07-01 14.9600 1940-08-01 14.7500 1940-09-01 14.8300 1940-10-01 20.8500 1940-11-01 24.2000 1940-12-01 21.0000 1941-01-01 17.4700 1941-02-01 13.7300 1941-03-01 21.2400 1941-04-01 22.3800 1941-05-01 27.4700 1941-06-01 19.4300 1941-07-01 21.4300 1941-08-01 42.8200 1941-09-01 35.6800 1941-10-01 31.0100 1941-11-01 23.5000 1941-12-01 20.5500 1942-01-01 15.8800 1942-02-01 19.8300 1942-03-01 26.8700 1942-04-01 37.0500 1942-05-01 44.7800 1942-06-01 71.5400 1942-07-01 72.6100 1942-08-01 59.0900 1942-09-01 78.2900 1942-10-01 51.7900 1942-11-01 22.3600 1942-12-01 22.8900 1943-01-01 11.7200 1943-02-01 18.5800 1943-03-01 14.2700 1943-04-01 8.79000 1943-05-01 6.35000 1943-06-01 10.1400 1943-07-01 6.76000 1943-08-01 20.1000 1943-09-01 4.78000 1943-10-01 6.56000 1943-11-01 8.33000 1943-12-01 12.8400 1944-01-01 6.46000 1944-02-01 6.46000 1944-03-01 7.53000 1944-04-01 7.58000 1944-05-01 4.56000 1944-06-01 5.41000 1944-07-01 8.24000 1944-08-01 7.86000 1944-09-01 10.3900 1944-10-01 8.01000 1944-11-01 10.9900 1944-12-01 14.4200 1945-01-01 7.97000 1945-02-01 9.26000 1945-03-01 20.1800 1945-04-01 13.1300 1945-05-01 8.91000 1945-06-01 8.45000 1945-07-01 14.7500 1945-08-01 17.5500 1945-09-01 27.5000 1945-10-01 29.1800 1945-11-01 34.4200 1945-12-01 32.6800 1946-01-01 30.8300 1946-02-01 31.5600 1946-03-01 44.3000 1946-04-01 34.1300 1946-05-01 39.1100 1946-06-01 34.6800 1946-07-01 31.4400 1946-08-01 28.3100 1946-09-01 21.0900 1946-10-01 28.9100 1946-11-01 18.1400 1946-12-01 15.6700 1947-01-01 19.8900 1947-02-01 16.4200 1947-03-01 16.9800 1947-04-01 20.4800 1947-05-01 19.1300 1947-06-01 19.0500 1947-07-01 23.0400 1947-08-01 29.1900 1947-09-01 15.8000 1947-10-01 23.2600 1947-11-01 19.0800 1947-12-01 22.9400 1948-01-01 16.8800 1948-02-01 17.3700 1948-03-01 15.8500 1948-04-01 19.5100 1948-05-01 22.0600 1948-06-01 18.1900 1948-07-01 24.8200 1948-08-01 19.4000 1948-09-01 16.1300 1948-10-01 18.3100 1948-11-01 13.2400 1948-12-01 13.5200 1949-01-01 11.3400 1949-02-01 10.0600 1949-03-01 13.4100 1949-04-01 15.0000 1949-05-01 12.1200 1949-06-01 13.0700 1949-07-01 12.8100 1949-08-01 10.3700 1949-09-01 14.0200 1949-10-01 12.9900 1949-11-01 11.0100 1949-12-01 13.5100 1950-01-01 10.8200 1950-02-01 9.81000 1950-03-01 15.7500 1950-04-01 21.9400 1950-05-01 20.6100 1950-06-01 20.8100 1950-07-01 21.7000 1950-08-01 27.9700 1950-09-01 23.8600 1950-10-01 23.5700 1950-11-01 21.1200 1950-12-01 21.2600 1951-01-01 25.8200 1951-02-01 20.7600 1951-03-01 19.8800 1951-04-01 22.0900 1951-05-01 18.5100 1951-06-01 18.8200 1951-07-01 17.6400 1951-08-01 17.1500 1951-09-01 18.8700 1951-10-01 14.9300 1951-11-01 11.6400 1951-12-01 19.9700 1952-01-01 10.0300 1952-02-01 10.9000 1952-03-01 12.7400 1952-04-01 17.4000 1952-05-01 14.2400 1952-06-01 18.1700 1952-07-01 17.0700 1952-08-01 17.5200 1952-09-01 15.6400 1952-10-01 19.5700 1952-11-01 17.8100 1952-12-01 26.3700 1953-01-01 14.5800 1953-02-01 16.2700 1953-03-01 15.7400 1953-04-01 21.6400 1953-05-01 23.2100 1953-06-01 14.8000 1953-07-01 31.5200 1953-08-01 17.8600 1953-09-01 19.6600 1953-10-01 25.6400 1953-11-01 20.6800 1953-12-01 14.0500 1954-01-01 16.1600 1954-02-01 12.7700 1954-03-01 16.2000 1954-04-01 21.8600 1954-05-01 23.5500 1954-06-01 22.6600 1954-07-01 21.2600 1954-08-01 19.4400 1954-09-01 19.9000 1954-10-01 25.3000 1954-11-01 17.2800 1954-12-01 22.2600 1955-01-01 19.6200 1955-02-01 20.6600 1955-03-01 23.2400 1955-04-01 24.6700 1955-05-01 24.7800 1955-06-01 26.3700 1955-07-01 30.9700 1955-08-01 25.7400 1955-09-01 28.3400 1955-10-01 26.9700 1955-11-01 24.6800 1955-12-01 22.9900 1956-01-01 23.2500 1956-02-01 23.6700 1956-03-01 32.6200 1956-04-01 31.4000 1956-05-01 29.0200 1956-06-01 27.9600 1956-07-01 27.2300 1956-08-01 25.7800 1956-09-01 25.1500 1956-10-01 23.5100 1956-11-01 23.0600 1956-12-01 20.8500