Month Dollars Each 1913-01-01 33.5200 1913-02-01 33.5200 1913-03-01 33.5200 1913-04-01 33.5200 1913-05-01 33.5200 1913-06-01 33.5200 1913-07-01 33.5200 1913-08-01 33.5200 1913-09-01 33.5200 1913-10-01 33.5200 1913-11-01 33.5200 1913-12-01 33.5200 1914-01-01 34.4500 1914-02-01 34.4500 1914-03-01 34.4500 1914-04-01 34.4500 1914-05-01 34.4500 1914-06-01 34.4500 1914-07-01 34.4500 1914-08-01 34.4500 1914-09-01 34.4500 1914-10-01 34.4500 1914-11-01 34.4500 1914-12-01 34.4500 1915-01-01 34.4500 1915-02-01 34.4500 1915-03-01 34.4500 1915-04-01 34.4500 1915-05-01 34.4500 1915-06-01 34.4500 1915-07-01 34.4500 1915-08-01 34.4500 1915-09-01 34.4500 1915-10-01 34.4500 1915-11-01 34.4500 1915-12-01 34.4500 1916-01-01 36.3100 1916-02-01 36.3100 1916-03-01 36.3100 1916-04-01 36.3100 1916-05-01 36.3100 1916-06-01 36.3100 1916-07-01 36.3100 1916-08-01 36.3100 1916-09-01 36.3100 1916-10-01 36.3100 1916-11-01 36.3100 1916-12-01 36.3100 1917-01-01 44.4000 1917-02-01 44.4000 1917-03-01 44.4000 1917-04-01 44.4000 1917-05-01 44.4000 1917-06-01 44.4000 1917-07-01 44.4000 1917-08-01 44.4000 1917-09-01 44.4000 1917-10-01 44.4000 1917-11-01 44.4000 1917-12-01 44.4000 1918-01-01 61.7500 1918-02-01 61.7500 1918-03-01 61.7500 1918-04-01 61.7500 1918-05-01 61.7500 1918-06-01 61.7500 1918-07-01 61.7500 1918-08-01 61.7500 1918-09-01 61.7500 1918-10-01 61.7500 1918-11-01 61.7500 1918-12-01 61.7500 1919-01-01 61.7500 1919-02-01 61.7500 1919-03-01 61.7500 1919-04-01 61.7500 1919-05-01 61.7500 1919-06-01 61.7500 1919-07-01 61.7500 1919-08-01 61.7500 1919-09-01 61.7500 1919-10-01 61.7500 1919-11-01 61.7500 1919-12-01 61.7500 1920-01-01 58.9000 1920-02-01 58.9000 1920-03-01 58.9000 1920-04-01 58.9000 1920-05-01 58.9000 1920-06-01 58.9000 1920-07-01 58.9000 1920-08-01 58.9000 1920-09-01 58.9000 1920-10-01 58.9000 1920-11-01 58.9000 1920-12-01 58.9000 1921-01-01 62.4600 1921-02-01 62.4600 1921-03-01 62.4600 1921-04-01 62.4600 1921-05-01 62.4600 1921-06-01 62.4600 1921-07-01 62.4600 1921-08-01 62.4600 1921-09-01 62.4600 1921-10-01 62.4600 1921-11-01 62.4600 1921-12-01 62.4600 1922-01-01 50.4000 1922-02-01 50.4000 1922-03-01 50.4000 1922-04-01 50.4000 1922-05-01 50.4000 1922-06-01 50.4000 1922-07-01 50.4000 1922-08-01 50.4000 1922-09-01 50.4000 1922-10-01 50.4000 1922-11-01 50.4000 1922-12-01 50.4000 1923-01-01 56.0500 1923-02-01 56.0500 1923-03-01 56.0500 1923-04-01 56.0500 1923-05-01 56.0500 1923-06-01 56.0500 1923-07-01 56.0500 1923-08-01 56.0500 1923-09-01 56.0500 1923-10-01 56.0500 1923-11-01 56.0500 1923-12-01 56.0500 1924-01-01 63.8900 1924-02-01 63.8900 1924-03-01 63.8900 1924-04-01 63.8900 1924-05-01 63.8900 1924-06-01 63.8900 1924-07-01 63.8900 1924-08-01 63.8900 1924-09-01 63.8900 1924-10-01 63.8900 1924-11-01 63.8900 1924-12-01 63.8900 1925-01-01 59.1400 1925-02-01 59.1400 1925-03-01 59.1400 1925-04-01 59.1400 1925-05-01 59.1400 1925-06-01 59.1400 1925-07-01 59.1400 1925-08-01 59.1400 1925-09-01 59.1400 1925-10-01 59.1400 1925-11-01 59.1400 1925-12-01 59.1400 1926-01-01 59.1400 1926-02-01 59.1400 1926-03-01 59.1400 1926-04-01 59.1400 1926-05-01 59.1400 1926-06-01 59.1400 1926-07-01 59.1400 1926-08-01 59.1400 1926-09-01 59.1400 1926-10-01 59.1400 1926-11-01 59.1400 1926-12-01 59.1400 1927-01-01 59.1400 1927-02-01 59.1400 1927-03-01 59.1400 1927-04-01 59.1400 1927-05-01 59.1400 1927-06-01 59.1400 1927-07-01 59.1400 1927-08-01 59.1400 1927-09-01 59.1400 1927-10-01 59.1400 1927-11-01 59.1400 1927-12-01 59.1400 1928-01-01 59.1400 1928-02-01 59.1400 1928-03-01 59.1400 1928-04-01 59.1400 1928-05-01 59.1400 1928-06-01 59.1400 1928-07-01 59.1400 1928-08-01 59.1400 1928-09-01 59.1400 1928-10-01 59.1400 1928-11-01 59.1400 1928-12-01 59.1400 1929-01-01 59.1400 1929-02-01 59.1400 1929-03-01 59.1400 1929-04-01 59.1400 1929-05-01 59.1400 1929-06-01 59.1400 1929-07-01 59.1400 1929-08-01 59.1400 1929-09-01 59.1400 1929-10-01 57.2400 1929-11-01 57.2400 1929-12-01 57.2400 1930-01-01 57.2400 1930-02-01 57.2400 1930-03-01 57.2400 1930-04-01 57.2400 1930-05-01 57.2400 1930-06-01 57.2400 1930-07-01 57.2400 1930-08-01 57.2400 1930-09-01 57.2400 1930-10-01 57.2400 1930-11-01 57.2400 1930-12-01 57.2400 1931-01-01 57.2400 1931-02-01 57.2400 1931-03-01 57.2400 1931-04-01 57.2400 1931-05-01 57.2400 1931-06-01 57.2400 1931-07-01 57.2400 1931-08-01 57.2400 1931-09-01 57.2400 1931-10-01 56.0500 1931-11-01 56.0500 1931-12-01 56.0500 1932-01-01 56.0500 1932-02-01 56.0500 1932-03-01 56.0500 1932-04-01 56.0500 1932-05-01 56.0500 1932-06-01 56.0500 1932-07-01 56.0500 1932-08-01 56.0500 1932-09-01 56.0500 1932-10-01 56.0500 1932-11-01 56.0500 1932-12-01 56.0500 1933-01-01 56.0500 1933-02-01 56.0500 1933-03-01 56.0500 1933-04-01 56.0500 1933-05-01 56.0500 1933-06-01 56.0500 1933-07-01 56.0500 1933-08-01 56.0500 1933-09-01 56.0500 1933-10-01 56.0500 1933-11-01 56.0500 1933-12-01 56.0500 1934-01-01 56.0500 1934-02-01 56.0500 1934-03-01 56.0500 1934-04-01 56.0500 1934-05-01 59.8500 1934-06-01 59.8500 1934-07-01 59.8500 1934-08-01 59.8500 1934-09-01 59.8500 1934-10-01 59.8500 1934-11-01 59.8500 1934-12-01 59.8500 1935-01-01 59.8500 1935-02-01 64.1200 1935-03-01 64.1200 1935-04-01 64.1200 1935-05-01 64.1200 1935-06-01 64.1200 1935-07-01 64.1200 1935-08-01 64.1200 1935-09-01 64.1200 1935-10-01 64.1200 1935-11-01 66.5000 1935-12-01 66.5000 1936-01-01 66.5000 1936-02-01 66.5000 1936-03-01 66.5000 1936-04-01 66.5000 1936-05-01 66.5000 1936-06-01 66.5000 1936-07-01 66.5000 1936-08-01 66.5000 1936-09-01 66.5000 1936-10-01 66.5000 1936-11-01 66.5000 1936-12-01 66.5000 1937-01-01 66.5000 1937-02-01 66.5000 1937-03-01 66.5000 1937-04-01 66.5000 1937-05-01 68.6400 1937-06-01 69.3500 1937-07-01 69.3500 1937-08-01 69.3500 1937-09-01 69.3500 1937-10-01 69.3500 1937-11-01 71.9600 1937-12-01 71.9600