Month Cents Per Pound 1917-11-01 4.50000 1917-12-01 4.50000 1918-01-01 4.50000 1918-02-01 4.50000 1918-03-01 4.50000 1918-04-01 4.50000 1918-05-01 4.25000 1918-06-01 3.50000 1918-07-01 3.50000 1918-08-01 3.50000 1918-09-01 3.50000 1918-10-01 3.50000 1918-11-01 3.50000 1918-12-01 3.50000 1919-01-01 3.30000 1919-02-01 3.30000 1919-03-01 3.30000 1919-04-01 3.30000 1919-05-01 3.30000 1919-06-01 3.05000 1919-07-01 3.05000 1919-08-01 3.31000 1919-09-01 3.30000 1919-10-01 3.30000 1919-11-01 3.30000 1919-12-01 3.30000 1920-01-01 3.45000 1920-02-01 4.63000 1920-03-01 5.00000 1920-04-01 5.25000 1920-05-01 5.50000 1920-06-01 5.50000 1920-07-01 5.50000 1920-08-01 5.50000 1920-09-01 5.50000 1920-10-01 5.25000 1920-11-01 4.70000 1920-12-01 3.65000 1921-01-01 3.30000 1921-02-01 3.11000 1921-03-01 2.93000 1921-04-01 2.76000 1921-05-01 2.53000 1921-06-01 2.50000 1921-07-01 2.46000 1921-08-01 2.23000 1921-09-01 2.00000 1921-10-01 2.00000 1921-11-01 2.00000 1921-12-01 2.00000 1922-01-01 2.00000 1922-02-01 1.84000 1922-03-01 1.81000 1922-04-01 1.98000 1922-05-01 2.20000 1922-06-01 2.40000 1922-07-01 2.50000 1922-08-01 2.60000 1922-09-01 2.75000 1922-10-01 2.90000 1922-11-01 2.83000 1922-12-01 2.75000 1923-01-01 2.75000 1923-02-01 2.86000 1923-03-01 3.18000 1923-04-01 3.30000 1923-05-01 3.30000 1923-06-01 3.23000 1923-07-01 3.00000 1923-08-01 3.00000 1923-09-01 3.00000 1923-10-01 3.00000 1923-11-01 3.00000 1923-12-01 2.88000 1924-01-01 3.00000 1924-02-01 3.00000 1924-03-01 2.93000 1924-04-01 2.75000 1924-05-01 2.75000 1924-06-01 2.50000 1924-07-01 2.50000 1924-08-01 2.35000 1924-09-01 2.25000 1924-10-01 2.25000 1924-11-01 2.25000 1924-12-01 2.25000 1925-01-01 2.25000 1925-02-01 2.35000 1925-03-01 2.40000 1925-04-01 2.40000 1925-05-01 2.20000 1925-06-01 2.20000 1925-07-01 2.20000 1925-08-01 2.20000 1925-09-01 2.20000 1925-10-01 2.23000 1925-11-01 2.30000 1925-12-01 2.30000 1926-01-01 2.30000 1926-02-01 2.30000 1926-03-01 2.30000 1926-04-01 2.30000 1926-05-01 2.30000 1926-06-01 2.30000 1926-07-01 2.30000 1926-08-01 2.30000 1926-09-01 2.30000 1926-10-01 2.30000 1926-11-01 2.30000 1926-12-01 2.30000 1927-01-01 2.34000 1927-02-01 2.21000 1927-03-01 2.30000 1927-04-01 2.30000 1927-05-01 2.30000 1927-06-01 2.30000 1927-07-01 2.30000 1927-08-01 2.30000 1927-09-01 2.30000 1927-10-01 2.19000 1927-11-01 2.10000 1927-12-01 2.03000 1928-01-01 2.01000 1928-02-01 2.08000 1928-03-01 2.10000 1928-04-01 2.10000 1928-05-01 1.96000 1928-06-01 1.85000 1928-07-01 1.85000 1928-08-01 1.85000 1928-09-01 1.85000 1928-10-01 1.85000 1928-11-01 1.88000 1928-12-01 1.80000 1929-01-01 1.80000 1929-02-01 1.80000 1929-03-01 1.80000 1929-04-01 1.90000 1929-05-01 1.90000 1929-06-01 1.90000 1929-07-01 1.90000 1929-08-01 1.90000 1929-09-01 1.90000 1929-10-01 1.90000 1929-11-01 1.90000 1929-12-01 1.90000 1930-01-01 1.80000 1930-02-01 1.80000 1930-03-01 1.79000 1930-04-01 1.70000 1930-05-01 1.70000 1930-06-01 1.69000 1930-07-01 1.65000 1930-08-01 1.65000 1930-09-01 1.65000 1930-10-01 1.60000 1930-11-01 1.58000 1930-12-01 1.55000 1931-01-01 1.55000 1931-02-01 1.55000 1931-03-01 1.55000 1931-04-01 1.55000 1931-05-01 1.55000 1931-06-01 1.55000 1931-07-01 1.55000 1931-08-01 1.55000 1931-09-01 1.55000 1931-10-01 1.54000 1931-11-01 1.50000 1931-12-01 1.49000 1932-01-01 1.41000 1932-02-01 1.40000 1932-03-01 1.40000 1932-04-01 1.40000 1932-05-01 1.40000 1932-06-01 1.41000 1932-07-01 1.45000 1932-08-01 1.45000 1932-09-01 1.45000 1932-10-01 1.45000 1932-11-01 1.45000 1932-12-01 1.45000 1933-01-01 1.45000 1933-02-01 1.45000 1933-03-01 1.45000 1933-04-01 1.45000 1933-05-01 1.49000 1933-06-01 1.55000 1933-07-01 1.60000 1933-08-01 1.64000 1933-09-01 1.68000 1933-10-01 1.75000 1933-11-01 1.75000 1933-12-01 1.75000 1934-01-01 1.75000 1934-02-01 1.75000 1934-03-01 1.75000 1934-04-01 1.81000 1934-05-01 2.00000 1934-06-01 2.00000 1934-07-01 1.88000 1934-08-01 1.85000 1934-09-01 1.85000 1934-10-01 1.85000 1934-11-01 1.85000 1934-12-01 1.85000 1935-01-01 1.85000 1935-02-01 1.85000 1935-03-01 1.85000 1935-04-01 1.85000 1935-05-01 1.85000 1935-06-01 1.85000 1935-07-01 1.85000 1935-08-01 1.85000 1935-09-01 1.85000 1935-10-01 1.85000 1935-11-01 1.85000 1935-12-01 1.85000 1936-01-01 1.85000 1936-02-01 1.85000 1936-03-01 1.85000 1936-04-01 1.85000 1936-05-01 1.85000 1936-06-01 1.85000 1936-07-01 1.95000 1936-08-01 1.95000 1936-09-01 1.95000 1936-10-01 1.95000 1936-11-01 1.95000 1936-12-01 2.11000 1937-01-01 2.15000 1937-02-01 2.15000 1937-03-01 2.35000 1937-04-01 2.40000 1937-05-01 2.40000 1937-06-01 2.40000 1937-07-01 2.40000 1937-08-01 2.40000 1937-09-01 2.40000 1937-10-01 2.40000 1937-11-01 2.40000 1937-12-01 2.40000 1938-01-01 2.40000 1938-02-01 2.40000 1938-03-01 2.40000 1938-04-01 2.40000 1938-05-01 2.38000 1938-06-01 2.27000 1938-07-01 2.15000 1938-08-01 2.15000 1938-09-01 2.15000 1938-10-01 2.03000 1938-11-01 2.15000 1938-12-01 2.15000 1939-01-01 2.15000 1939-02-01 2.15000 1939-03-01 2.15000 1939-04-01 2.15000 1939-05-01 2.06000 1939-06-01 2.00000 1939-07-01 2.00000 1939-08-01 2.00000 1939-09-01 2.00000 1939-10-01 2.00000 1939-11-01 2.02000 1939-12-01 2.10000 1940-01-01 2.10000 1940-02-01 2.10000 1940-03-01 2.10000 1940-04-01 1.98000 1940-05-01 2.10000 1940-06-01 2.10000 1940-07-01 2.10000