Month Million Square Feet 1925-01-01 28.1000 1925-02-01 28.9000 1925-03-01 47.1000 1925-04-01 52.8000 1925-05-01 49.5000 1925-06-01 45.2000 1925-07-01 50.2000 1925-08-01 53.8000 1925-09-01 48.7000 1925-10-01 53.8000 1925-11-01 51.8000 1925-12-01 49.8000 1926-01-01 39.6000 1926-02-01 33.6000 1926-03-01 51.5000 1926-04-01 53.6000 1926-05-01 50.8000 1926-06-01 46.6000 1926-07-01 36.7000 1926-08-01 42.1000 1926-09-01 41.6000 1926-10-01 43.6000 1926-11-01 43.1000 1926-12-01 38.2000 1927-01-01 31.5000 1927-02-01 32.4000 1927-03-01 50.2000 1927-04-01 49.6000 1927-05-01 39.9000 1927-06-01 43.7000 1927-07-01 36.2000 1927-08-01 41.2000 1927-09-01 39.7000 1927-10-01 47.3000 1927-11-01 42.9000 1927-12-01 40.0000 1928-01-01 39.1000 1928-02-01 44.2000 1928-03-01 56.8000 1928-04-01 57.0000 1928-05-01 58.6000 1928-06-01 53.7000 1928-07-01 44.7000 1928-08-01 44.6000 1928-09-01 40.7000 1928-10-01 49.6000 1928-11-01 42.2000 1928-12-01 37.2000 1929-01-01 29.3000 1929-02-01 27.3000 1929-03-01 41.7000 1929-04-01 51.7000 1929-05-01 40.3000 1929-06-01 36.5000 1929-07-01 37.8000 1929-08-01 29.5000 1929-09-01 25.6000 1929-10-01 28.8000 1929-11-01 21.4000 1929-12-01 17.8000 1930-01-01 13.8000 1930-02-01 15.2000 1930-03-01 20.7000 1930-04-01 25.4000 1930-05-01 23.5000 1930-06-01 20.8000 1930-07-01 18.2000 1930-08-01 16.8000 1930-09-01 19.7000 1930-10-01 22.3000 1930-11-01 18.8000 1930-12-01 14.7000 1931-01-01 12.2000 1931-02-01 16.6000 1931-03-01 22.1000 1931-04-01 22.6000 1931-05-01 21.9000 1931-06-01 16.9000 1931-07-01 15.9000 1931-08-01 14.1000 1931-09-01 13.0000 1931-10-01 15.2000 1931-11-01 11.0000 1931-12-01 8.80000 1932-01-01 6.90000 1932-02-01 6.10000 1932-03-01 8.50000 1932-04-01 7.20000 1932-05-01 6.70000 1932-06-01 5.80000 1932-07-01 5.50000 1932-08-01 5.60000 1932-09-01 6.60000 1932-10-01 6.00000 1932-11-01 5.50000 1932-12-01 3.40000 1933-01-01 3.20000 1933-02-01 3.20000 1933-03-01 4.80000 1933-04-01 5.80000 1933-05-01 8.40000 1933-06-01 8.30000 1933-07-01 7.40000 1933-08-01 6.40000 1933-09-01 6.30000 1933-10-01 6.90000 1933-11-01 6.40000 1933-12-01 5.90000 1934-01-01 3.90000 1934-02-01 3.60000 1934-03-01 7.00000 1934-04-01 5.90000 1934-05-01 6.20000 1934-06-01 6.60000 1934-07-01 4.80000 1934-08-01 5.00000 1934-09-01 4.80000 1934-10-01 7.00000 1934-11-01 5.30000 1934-12-01 4.10000 1935-01-01 5.50000 1935-02-01 4.60000 1935-03-01 8.80000 1935-04-01 11.9000 1935-05-01 13.1000 1935-06-01 13.7000 1935-07-01 13.1000 1935-08-01 11.8000 1935-09-01 12.0000 1935-10-01 16.8000 1935-11-01 12.3000 1935-12-01 11.9000 1936-01-01 10.3000 1936-02-01 9.10000 1936-03-01 15.6000 1936-04-01 19.7000 1936-05-01 20.6000 1936-06-01 20.6000 1936-07-01 20.5000 1936-08-01 24.4000 1936-09-01 21.2000 1936-10-01 21.6000 1936-11-01 20.0000 1936-12-01 19.0000 1937-01-01 18.4000 1937-02-01 17.7000 1937-03-01 24.2000 1937-04-01 29.4000 1937-05-01 23.0000 1937-06-01 23.8000 1937-07-01 20.6000 1937-08-01 18.9000 1937-09-01 17.0000 1937-10-01 16.3000 1937-11-01 15.2000 1937-12-01 10.9000 1938-01-01 9.40000 1938-02-01 10.4000 1938-03-01 20.1000 1938-04-01 18.7000 1938-05-01 20.6000 1938-06-01 21.3000 1938-07-01 21.6000 1938-08-01 23.6000 1938-09-01 21.8000 1938-10-01 27.2000 1938-11-01 23.4000 1938-12-01 22.7000 1939-01-01 20.0000 1939-02-01 19.2000 1939-03-01 30.7000 1939-04-01 28.4000 1939-05-01 32.6000 1939-06-01 27.5000 1939-07-01 27.2000 1939-08-01 31.2000 1939-09-01 33.0000 1939-10-01 29.4000 1939-11-01 31.0000 1939-12-01 22.6000 1940-01-01 19.1000 1940-02-01 19.1000 1940-03-01 31.1000 1940-04-01 33.5000 1940-05-01 36.3000 1940-06-01 33.5000 1940-07-01 36.2000 1940-08-01 39.0000 1940-09-01 41.6000 1940-10-01 40.8000 1940-11-01 42.2000 1940-12-01 48.2000 1941-01-01 28.5000 1941-02-01 29.3000 1941-03-01 35.8000 1941-04-01 42.0000 1941-05-01 54.6000 1941-06-01 52.1000 1941-07-01 52.9000 1941-08-01 62.8000 1941-09-01 43.6000 1941-10-01 45.4000 1941-11-01 30.2000 1941-12-01 25.6000 1942-01-01 26.9000 1942-02-01 41.8000 1942-03-01 50.8000 1942-04-01 38.3000 1942-05-01 38.2000 1942-06-01 50.7000 1942-07-01 33.6000 1942-08-01 26.2000 1942-09-01 29.8000 1942-10-01 37.4000 1942-11-01 37.7000 1942-12-01 38.1000 1943-01-01 24.9000 1943-02-01 22.2000 1943-03-01 17.0000 1943-04-01 18.8000 1943-05-01 15.2000 1943-06-01 14.1000 1943-07-01 16.7000 1943-08-01 16.8000 1943-09-01 11.4000 1943-10-01 14.8000 1943-11-01 13.7000 1943-12-01 15.2000 1944-01-01 8.90000 1944-02-01 5.40000 1944-03-01 7.50000 1944-04-01 8.20000 1944-05-01 7.30000 1944-06-01 6.50000 1944-07-01 5.00000 1944-08-01 4.90000 1944-09-01 4.40000 1944-10-01 6.30000 1944-11-01 4.70000 1944-12-01 4.90000 1945-01-01 3.70000 1945-02-01 4.10000 1945-03-01 5.30000 1945-04-01 10.8000 1945-05-01 10.2000 1945-06-01 7.70000 1945-07-01 8.40000 1945-08-01 7.60000 1945-09-01 8.60000 1945-10-01 11.8000 1945-11-01 15.9000 1945-12-01 17.1000 1946-01-01 18.6000 1946-02-01 18.4000 1946-03-01 49.2000 1946-04-01 65.5000 1946-05-01 75.0000 1946-06-01 51.5000 1946-07-01 45.3000 1946-08-01 45.1000 1946-09-01 47.1000 1946-10-01 36.9000 1946-11-01 33.5000 1946-12-01 30.0000 1947-01-01 39.3000 1947-02-01 32.5000 1947-03-01 43.0000 1947-04-01 39.0000 1947-05-01 42.7000 1947-06-01 29.2000 1947-07-01 36.8000 1947-08-01 47.8000 1947-09-01 41.3000 1947-10-01 52.3000 1947-11-01 42.7000 1947-12-01 32.2000 1948-01-01 32.2000 1948-02-01 31.5000 1948-03-01 35.4000 1948-04-01 46.5000 1948-05-01 51.7000 1948-06-01 40.2000 1948-07-01 44.4000 1948-08-01 44.6000 1948-09-01 35.6000 1948-10-01 37.2000 1948-11-01 33.6000 1948-12-01 31.5000 1949-01-01 19.9000 1949-02-01 26.7000 1949-03-01 28.3000 1949-04-01 37.5000 1949-05-01 43.0000 1949-06-01 46.3000 1949-07-01 43.5000 1949-08-01 48.8000 1949-09-01 63.0000 1949-10-01 60.8000 1949-11-01 53.3000 1949-12-01 49.5000 1950-01-01 42.1000 1950-02-01 46.2000 1950-03-01 71.5000 1950-04-01 85.0000 1950-05-01 84.9000 1950-06-01 77.9000 1950-07-01 84.3000 1950-08-01 89.0000 1950-09-01 65.1000 1950-10-01 64.9000 1950-11-01 60.8000 1950-12-01 56.4000 1951-01-01 49.3000 1951-02-01 60.9000 1951-03-01 65.8000 1951-04-01 65.2000 1951-05-01 73.6000 1951-06-01 60.5000 1951-07-01 58.8000 1951-08-01 60.4000 1951-09-01 52.4000 1951-10-01 52.5000 1951-11-01 47.3000 1951-12-01 38.0000 1952-01-01 37.4000 1952-02-01 45.4000 1952-03-01 65.4000 1952-04-01 73.9000 1952-05-01 82.6000 1952-06-01 62.2000 1952-07-01 64.0000 1952-08-01 65.9000 1952-09-01 56.7000 1952-10-01 65.5000 1952-11-01 55.9000 1952-12-01 49.0000 1953-01-01 51.3000 1953-02-01 46.7000 1953-03-01 65.4000 1953-04-01 70.6000 1953-05-01 66.7000 1953-06-01 49.8000 1953-07-01 70.2000 1953-08-01 53.2000 1953-09-01 52.5000 1953-10-01 65.9000 1953-11-01 50.3000 1953-12-01 46.6000 1954-01-01 48.2000 1954-02-01 52.7000 1954-03-01 69.6000 1954-04-01 80.4000 1954-05-01 85.0000 1954-06-01 73.1000 1954-07-01 74.8000 1954-08-01 70.6000 1954-09-01 79.0000 1954-10-01 85.8000 1954-11-01 71.8000 1954-12-01 77.3000 1955-01-01 68.1000 1955-02-01 74.5000 1955-03-01 98.8000 1955-04-01 107.900 1955-05-01 97.3000 1955-06-01 95.5000 1955-07-01 94.5000 1955-08-01 82.1000 1955-09-01 72.0000 1955-10-01 77.0000 1955-11-01 73.6000 1955-12-01 70.4000 1956-01-01 68.2000 1956-02-01 77.1000 1956-03-01 108.100 1956-04-01 112.500 1956-05-01 108.200 1956-06-01 81.0000 1956-07-01 72.7000 1956-08-01 80.3000 1956-09-01 73.0000 1956-10-01 63.2000 1956-11-01 58.2000 1956-12-01 41.4000