Month Million Square Feet 1925-01-01 11.5100 1925-02-01 8.32000 1925-03-01 12.2600 1925-04-01 13.0500 1925-05-01 14.8000 1925-06-01 14.8400 1925-07-01 14.2900 1925-08-01 17.9800 1925-09-01 14.1300 1925-10-01 12.9200 1925-11-01 11.8200 1925-12-01 14.1300 1926-01-01 12.0100 1926-02-01 9.53000 1926-03-01 17.1200 1926-04-01 15.4300 1926-05-01 13.5300 1926-06-01 12.5400 1926-07-01 11.2600 1926-08-01 13.3100 1926-09-01 14.7300 1926-10-01 11.8000 1926-11-01 10.2400 1926-12-01 10.8600 1927-01-01 11.5700 1927-02-01 9.50000 1927-03-01 16.2600 1927-04-01 13.1600 1927-05-01 13.3000 1927-06-01 13.5100 1927-07-01 12.9400 1927-08-01 11.5700 1927-09-01 10.2400 1927-10-01 12.3900 1927-11-01 7.93000 1927-12-01 9.46000 1928-01-01 11.4300 1928-02-01 10.1800 1928-03-01 11.7200 1928-04-01 14.6100 1928-05-01 15.1100 1928-06-01 14.6500 1928-07-01 17.6100 1928-08-01 12.5500 1928-09-01 11.8800 1928-10-01 14.1000 1928-11-01 13.7800 1928-12-01 11.5700 1929-01-01 15.2800 1929-02-01 11.6400 1929-03-01 13.5200 1929-04-01 15.6800 1929-05-01 16.6500 1929-06-01 13.9300 1929-07-01 14.4200 1929-08-01 14.3200 1929-09-01 13.5100 1929-10-01 13.2700 1929-11-01 13.6700 1929-12-01 5.37000 1930-01-01 8.60000 1930-02-01 10.7100 1930-03-01 12.7200 1930-04-01 10.5100 1930-05-01 9.90000 1930-06-01 9.49000 1930-07-01 7.33000 1930-08-01 7.91000 1930-09-01 5.72000 1930-10-01 6.67000 1930-11-01 4.73000 1930-12-01 3.56000 1931-01-01 4.33000 1931-02-01 3.75000 1931-03-01 5.10000 1931-04-01 4.09000 1931-05-01 4.82000 1931-06-01 5.01000 1931-07-01 4.14000 1931-08-01 3.39000 1931-09-01 4.95000 1931-10-01 6.13000 1931-11-01 2.53000 1931-12-01 1.80000 1932-01-01 1.72000 1932-02-01 1.86000 1932-03-01 2.61000 1932-04-01 2.11000 1932-05-01 2.24000 1932-06-01 2.27000 1932-07-01 1.91000 1932-08-01 2.99000 1932-09-01 2.04000 1932-10-01 1.54000 1932-11-01 1.61000 1932-12-01 0.980000 1933-01-01 1.07000 1933-02-01 1.28000 1933-03-01 1.38000 1933-04-01 1.62000 1933-05-01 2.29000 1933-06-01 2.82000 1933-07-01 2.65000 1933-08-01 2.37000 1933-09-01 1.79000 1933-10-01 1.98000 1933-11-01 1.80000 1933-12-01 1.53000 1934-01-01 1.43000 1934-02-01 1.13000 1934-03-01 2.34000 1934-04-01 2.64000 1934-05-01 3.64000 1934-06-01 2.30000 1934-07-01 2.19000 1934-08-01 2.44000 1934-09-01 2.54000 1934-10-01 2.77000 1934-11-01 2.78000 1934-12-01 2.06000 1935-01-01 2.24000 1935-02-01 1.74000 1935-03-01 2.10000 1935-04-01 3.33000 1935-05-01 3.39000 1935-06-01 2.98000 1935-07-01 2.83000 1935-08-01 3.23000 1935-09-01 3.21000 1935-10-01 4.07000 1935-11-01 3.50000 1935-12-01 2.77000 1936-01-01 2.99000 1936-02-01 2.46000 1936-03-01 4.20000 1936-04-01 5.25000 1936-05-01 4.46000 1936-06-01 5.87000 1936-07-01 6.18000 1936-08-01 5.36000 1936-09-01 4.94000 1936-10-01 5.19000 1936-11-01 5.72000 1936-12-01 4.55000 1937-01-01 4.32000 1937-02-01 3.70000 1937-03-01 5.94000 1937-04-01 6.47000 1937-05-01 5.53000 1937-06-01 5.29000 1937-07-01 6.84000 1937-08-01 5.58000 1937-09-01 5.78000 1937-10-01 5.52000 1937-11-01 4.24000 1937-12-01 3.08000 1938-01-01 2.71000 1938-02-01 2.40000 1938-03-01 3.35000 1938-04-01 4.42000 1938-05-01 3.78000 1938-06-01 3.54000 1938-07-01 4.36000 1938-08-01 3.65000 1938-09-01 2.86000 1938-10-01 4.62000 1938-11-01 3.11000 1938-12-01 2.99000 1939-01-01 3.39000 1939-02-01 2.39000 1939-03-01 3.37000 1939-04-01 4.15000 1939-05-01 3.56000 1939-06-01 4.42000 1939-07-01 4.70000 1939-08-01 3.86000 1939-09-01 5.65000 1939-10-01 4.98000 1939-11-01 4.30000 1939-12-01 4.03000 1940-01-01 2.66000 1940-02-01 3.50000 1940-03-01 4.21000 1940-04-01 4.37000 1940-05-01 5.12000 1940-06-01 6.49000 1940-07-01 7.77000 1940-08-01 6.33000 1940-09-01 6.28000 1940-10-01 7.86000 1940-11-01 6.24000 1940-12-01 5.75000 1941-01-01 5.98000 1941-02-01 4.00000 1941-03-01 6.68000 1941-04-01 8.22000 1941-05-01 11.3700 1941-06-01 7.51000 1941-07-01 7.26000 1941-08-01 14.4700 1941-09-01 14.5800 1941-10-01 12.7100 1941-11-01 6.18000 1941-12-01 6.89000 1942-01-01 3.17000 1942-02-01 4.59000 1942-03-01 8.86000 1942-04-01 7.58000 1942-05-01 5.16000 1942-06-01 13.5100 1942-07-01 7.17000 1942-08-01 5.82000 1942-09-01 1.42000 1942-10-01 5.06000 1942-11-01 3.03000 1942-12-01 8.69000 1943-01-01 1.19000 1943-02-01 5.08000 1943-03-01 4.15000 1943-04-01 1.31000 1943-05-01 2.13000 1943-06-01 1.32000 1943-07-01 1.00000 1943-08-01 1.27000 1943-09-01 0.890000 1943-10-01 0.960000 1943-11-01 1.68000 1943-12-01 1.20000 1944-01-01 0.590000 1944-02-01 0.680000 1944-03-01 1.31000 1944-04-01 1.06000 1944-05-01 0.720000 1944-06-01 1.24000 1944-07-01 0.770000 1944-08-01 0.970000 1944-09-01 1.00000 1944-10-01 1.28000 1944-11-01 1.31000 1944-12-01 1.57000 1945-01-01 1.03000 1945-02-01 1.23000 1945-03-01 1.61000 1945-04-01 1.94000 1945-05-01 1.43000 1945-06-01 3.31000 1945-07-01 3.41000 1945-08-01 4.33000 1945-09-01 8.34000 1945-10-01 11.4100 1945-11-01 12.6000 1945-12-01 12.5600 1946-01-01 10.8400 1946-02-01 12.1200 1946-03-01 19.9400 1946-04-01 13.1000 1946-05-01 12.7600 1946-06-01 9.05000 1946-07-01 8.96000 1946-08-01 8.41000 1946-09-01 7.66000 1946-10-01 6.09000 1946-11-01 5.30000 1946-12-01 4.36000 1947-01-01 4.30000 1947-02-01 5.09000 1947-03-01 5.95000 1947-04-01 9.30000 1947-05-01 7.81000 1947-06-01 7.82000 1947-07-01 9.57000 1947-08-01 17.7400 1947-09-01 3.62000 1947-10-01 9.67000 1947-11-01 10.2000 1947-12-01 7.95000 1948-01-01 8.75000 1948-02-01 7.54000 1948-03-01 7.89000 1948-04-01 9.26000 1948-05-01 10.4400 1948-06-01 8.86000 1948-07-01 10.7600 1948-08-01 8.31000 1948-09-01 8.50000 1948-10-01 8.47000 1948-11-01 6.29000 1948-12-01 5.54000 1949-01-01 5.52000 1949-02-01 5.52000 1949-03-01 8.43000 1949-04-01 9.20000 1949-05-01 6.57000 1949-06-01 7.38000 1949-07-01 7.62000 1949-08-01 6.38000 1949-09-01 9.43000 1949-10-01 7.49000 1949-11-01 6.29000 1949-12-01 6.63000 1950-01-01 5.93000 1950-02-01 5.85000 1950-03-01 8.84000 1950-04-01 10.6600 1950-05-01 10.4200 1950-06-01 10.6700 1950-07-01 12.2200 1950-08-01 14.4300 1950-09-01 12.9000 1950-10-01 10.5500 1950-11-01 10.0100 1950-12-01 9.95000 1951-01-01 11.3100 1951-02-01 7.83000 1951-03-01 6.72000 1951-04-01 7.64000 1951-05-01 4.84000 1951-06-01 5.49000 1951-07-01 6.12000 1951-08-01 4.75000 1951-09-01 7.69000 1951-10-01 6.58000 1951-11-01 4.86000 1951-12-01 3.39000 1952-01-01 3.75000 1952-02-01 4.88000 1952-03-01 5.92000 1952-04-01 6.57000 1952-05-01 6.59000 1952-06-01 6.30000 1952-07-01 6.41000 1952-08-01 7.86000 1952-09-01 7.26000 1952-10-01 9.68000 1952-11-01 7.98000 1952-12-01 8.88000 1953-01-01 7.09000 1953-02-01 8.01000 1953-03-01 8.53000 1953-04-01 10.3400 1953-05-01 12.7500 1953-06-01 8.62000 1953-07-01 19.1700 1953-08-01 9.84000 1953-09-01 9.84000 1953-10-01 12.9000 1953-11-01 8.17000 1953-12-01 7.65000 1954-01-01 8.13000 1954-02-01 7.36000 1954-03-01 9.52000 1954-04-01 12.5900 1954-05-01 14.8300 1954-06-01 13.2700 1954-07-01 10.8200 1954-08-01 11.1500 1954-09-01 10.4700 1954-10-01 14.0800 1954-11-01 10.2200 1954-12-01 15.0400 1955-01-01 13.1700 1955-02-01 10.3800 1955-03-01 14.2400 1955-04-01 13.4700 1955-05-01 14.8000 1955-06-01 16.7900 1955-07-01 19.1400 1955-08-01 15.2900 1955-09-01 14.7800 1955-10-01 13.5200 1955-11-01 14.5100 1955-12-01 13.1500 1956-01-01 12.1300 1956-02-01 11.5200 1956-03-01 16.0500 1956-04-01 16.5900 1956-05-01 15.8800 1956-06-01 15.6600 1956-07-01 15.6500 1956-08-01 13.4800 1956-09-01 12.6600 1956-10-01 12.6200 1956-11-01 12.6200 1956-12-01 11.0100