Month Million Square Feet 1925-01-01 21.9000 1925-02-01 19.7000 1925-03-01 28.6000 1925-04-01 31.3000 1925-05-01 31.6000 1925-06-01 35.3000 1925-07-01 35.3000 1925-08-01 37.6000 1925-09-01 36.0000 1925-10-01 29.3000 1925-11-01 26.6000 1925-12-01 27.8000 1926-01-01 24.5000 1926-02-01 21.5000 1926-03-01 34.3000 1926-04-01 32.0000 1926-05-01 33.0000 1926-06-01 30.1000 1926-07-01 31.4000 1926-08-01 33.2000 1926-09-01 32.2000 1926-10-01 27.8000 1926-11-01 26.6000 1926-12-01 24.9000 1927-01-01 21.0000 1927-02-01 21.7000 1927-03-01 36.5000 1927-04-01 33.4000 1927-05-01 32.7000 1927-06-01 33.4000 1927-07-01 30.9000 1927-08-01 31.1000 1927-09-01 27.0000 1927-10-01 28.4000 1927-11-01 25.1000 1927-12-01 22.4000 1928-01-01 24.2000 1928-02-01 24.1000 1928-03-01 30.5000 1928-04-01 36.9000 1928-05-01 34.7000 1928-06-01 40.1000 1928-07-01 36.9000 1928-08-01 33.5000 1928-09-01 34.6000 1928-10-01 35.6000 1928-11-01 30.5000 1928-12-01 26.8000 1929-01-01 28.1000 1929-02-01 26.2000 1929-03-01 34.8000 1929-04-01 32.7000 1929-05-01 40.1000 1929-06-01 34.3000 1929-07-01 37.1000 1929-08-01 36.0000 1929-09-01 32.9000 1929-10-01 35.6000 1929-11-01 29.1000 1929-12-01 25.3000 1930-01-01 17.3000 1930-02-01 21.3000 1930-03-01 32.3000 1930-04-01 29.2000 1930-05-01 29.1000 1930-06-01 25.5000 1930-07-01 25.4000 1930-08-01 21.7000 1930-09-01 20.0000 1930-10-01 16.8000 1930-11-01 13.8000 1930-12-01 13.7000 1931-01-01 11.8000 1931-02-01 11.4000 1931-03-01 15.3000 1931-04-01 15.9000 1931-05-01 16.6000 1931-06-01 15.5000 1931-07-01 16.4000 1931-08-01 15.7000 1931-09-01 16.6000 1931-10-01 15.2000 1931-11-01 9.20000 1931-12-01 8.10000 1932-01-01 5.40000 1932-02-01 6.00000 1932-03-01 8.20000 1932-04-01 6.50000 1932-05-01 8.90000 1932-06-01 6.40000 1932-07-01 8.60000 1932-08-01 8.10000 1932-09-01 6.70000 1932-10-01 4.90000 1932-11-01 6.00000 1932-12-01 3.40000 1933-01-01 4.40000 1933-02-01 4.00000 1933-03-01 5.00000 1933-04-01 5.00000 1933-05-01 6.50000 1933-06-01 7.00000 1933-07-01 6.90000 1933-08-01 6.30000 1933-09-01 6.50000 1933-10-01 8.30000 1933-11-01 5.10000 1933-12-01 5.20000 1934-01-01 5.60000 1934-02-01 4.30000 1934-03-01 7.50000 1934-04-01 8.00000 1934-05-01 8.00000 1934-06-01 7.10000 1934-07-01 8.30000 1934-08-01 8.90000 1934-09-01 7.60000 1934-10-01 7.90000 1934-11-01 7.30000 1934-12-01 5.00000 1935-01-01 5.70000 1935-02-01 5.00000 1935-03-01 7.00000 1935-04-01 7.70000 1935-05-01 9.20000 1935-06-01 9.10000 1935-07-01 8.30000 1935-08-01 9.60000 1935-09-01 8.60000 1935-10-01 10.8000 1935-11-01 11.7000 1935-12-01 20.7000 1936-01-01 16.1000 1936-02-01 11.4000 1936-03-01 15.1000 1936-04-01 17.4000 1936-05-01 15.6000 1936-06-01 15.9000 1936-07-01 17.5000 1936-08-01 15.5000 1936-09-01 13.6000 1936-10-01 14.3000 1936-11-01 14.6000 1936-12-01 14.3000 1937-01-01 14.7000 1937-02-01 10.7000 1937-03-01 16.6000 1937-04-01 18.4000 1937-05-01 16.7000 1937-06-01 21.7000 1937-07-01 24.5000 1937-08-01 21.2000 1937-09-01 14.5000 1937-10-01 13.6000 1937-11-01 13.7000 1937-12-01 16.6000 1938-01-01 9.60000 1938-02-01 8.30000 1938-03-01 13.6000 1938-04-01 13.6000 1938-05-01 13.7000 1938-06-01 14.4000 1938-07-01 11.5000 1938-08-01 14.7000 1938-09-01 15.5000 1938-10-01 23.1000 1938-11-01 21.5000 1938-12-01 25.5000 1939-01-01 14.3000 1939-02-01 12.7000 1939-03-01 17.9000 1939-04-01 16.5000 1939-05-01 12.6000 1939-06-01 15.4000 1939-07-01 17.6000 1939-08-01 12.2000 1939-09-01 16.4000 1939-10-01 15.4000 1939-11-01 15.3000 1939-12-01 11.6000 1940-01-01 9.00000 1940-02-01 12.3000 1940-03-01 14.4000 1940-04-01 16.5000 1940-05-01 16.5000 1940-06-01 17.9000 1940-07-01 23.4000 1940-08-01 23.5000 1940-09-01 23.3000 1940-10-01 33.8000 1940-11-01 33.7000 1940-12-01 42.1000 1941-01-01 23.8000 1941-02-01 19.7000 1941-03-01 29.4000 1941-04-01 31.4000 1941-05-01 44.4000 1941-06-01 31.7000 1941-07-01 38.1000 1941-08-01 63.5000 1941-09-01 46.7000 1941-10-01 54.0000 1941-11-01 30.9000 1941-12-01 24.8000 1942-01-01 21.0000 1942-02-01 31.5000 1942-03-01 42.3000 1942-04-01 51.3000 1942-05-01 67.9000 1942-06-01 134.000 1942-07-01 113.200 1942-08-01 90.6000 1942-09-01 97.7000 1942-10-01 77.2000 1942-11-01 52.6000 1942-12-01 67.3000 1943-01-01 27.9000 1943-02-01 37.8000 1943-03-01 28.2000 1943-04-01 18.8000 1943-05-01 15.0000 1943-06-01 17.0000 1943-07-01 10.7000 1943-08-01 26.3000 1943-09-01 11.4000 1943-10-01 13.0000 1943-11-01 14.2000 1943-12-01 23.4000 1944-01-01 11.2000 1944-02-01 11.7000 1944-03-01 11.9000 1944-04-01 12.3000 1944-05-01 8.00000 1944-06-01 10.1000 1944-07-01 14.4000 1944-08-01 12.1000 1944-09-01 15.5000 1944-10-01 11.4000 1944-11-01 16.9000 1944-12-01 19.1000 1945-01-01 11.3000 1945-02-01 11.9000 1945-03-01 25.4000 1945-04-01 20.5000 1945-05-01 13.5000 1945-06-01 13.7000 1945-07-01 21.3000 1945-08-01 22.5000 1945-09-01 32.7000 1945-10-01 35.2000 1945-11-01 39.8000 1945-12-01 37.7000 1946-01-01 36.2000 1946-02-01 37.8000 1946-03-01 50.6000 1946-04-01 41.7000 1946-05-01 45.1000 1946-06-01 41.1000 1946-07-01 42.3000 1946-08-01 32.8000 1946-09-01 25.9000 1946-10-01 33.6000 1946-11-01 23.6000 1946-12-01 19.5000 1947-01-01 25.5000 1947-02-01 21.2000 1947-03-01 22.1000 1947-04-01 25.9000 1947-05-01 28.7000 1947-06-01 27.4000 1947-07-01 31.8000 1947-08-01 41.2000 1947-09-01 25.9000 1947-10-01 33.3000 1947-11-01 28.2000 1947-12-01 32.9000 1948-01-01 27.3000 1948-02-01 29.0000 1948-03-01 25.4000 1948-04-01 34.0000 1948-05-01 40.1000 1948-06-01 33.5000 1948-07-01 44.4000 1948-08-01 33.6000 1948-09-01 28.6000 1948-10-01 32.4000 1948-11-01 24.9000 1948-12-01 27.9000 1949-01-01 21.6000 1949-02-01 21.2000 1949-03-01 27.3000 1949-04-01 31.7000 1949-05-01 29.7000 1949-06-01 32.8000 1949-07-01 32.9000 1949-08-01 25.5000 1949-09-01 32.1000 1949-10-01 31.6000 1949-11-01 25.2000 1949-12-01 27.3000 1950-01-01 22.0000 1950-02-01 24.6000 1950-03-01 37.3000 1950-04-01 42.5000 1950-05-01 40.1000 1950-06-01 44.7000 1950-07-01 46.0000 1950-08-01 51.0000 1950-09-01 46.9000 1950-10-01 42.1000 1950-11-01 40.9000 1950-12-01 39.4000 1951-01-01 43.4000 1951-02-01 36.6000 1951-03-01 42.8000 1951-04-01 41.3000 1951-05-01 44.2000 1951-06-01 40.7000 1951-07-01 39.5000 1951-08-01 36.5000 1951-09-01 35.8000 1951-10-01 34.0000 1951-11-01 27.4000 1951-12-01 42.8000 1952-01-01 24.8000 1952-02-01 24.7000 1952-03-01 33.1000 1952-04-01 39.2000 1952-05-01 37.1000 1952-06-01 41.0000 1952-07-01 40.7000 1952-08-01 38.6000 1952-09-01 29.2000 1952-10-01 38.2000 1952-11-01 38.7000 1952-12-01 51.0000 1953-01-01 31.8000 1953-02-01 31.1000 1953-03-01 35.3000 1953-04-01 44.0000 1953-05-01 45.2000 1953-06-01 35.1000 1953-07-01 56.8000 1953-08-01 39.7000 1953-09-01 37.8000 1953-10-01 52.0000 1953-11-01 40.0000 1953-12-01 35.3000 1954-01-01 33.8000 1954-02-01 32.0000 1954-03-01 41.4000 1954-04-01 45.7000 1954-05-01 51.6000 1954-06-01 48.8000 1954-07-01 48.6000 1954-08-01 42.3000 1954-09-01 45.0000 1954-10-01 49.8000 1954-11-01 38.3000 1954-12-01 51.1000 1955-01-01 42.5000 1955-02-01 41.7000 1955-03-01 51.7000 1955-04-01 51.8000 1955-05-01 51.3000 1955-06-01 56.9000 1955-07-01 63.1000 1955-08-01 47.6000 1955-09-01 49.4000 1955-10-01 48.7000 1955-11-01 45.9000 1955-12-01 49.1000 1956-01-01 47.7000 1956-02-01 44.5000 1956-03-01 61.8000 1956-04-01 60.4000 1956-05-01 59.1000 1956-06-01 53.4000 1956-07-01 56.1000 1956-08-01 54.5000 1956-09-01 52.0000 1956-10-01 48.3000 1956-11-01 48.7000 1956-12-01 44.7000