Monthly Per Cent Base Scale
1917-01-01 119.500
1917-02-01 119.500
1917-03-01 137.500
1917-04-01 137.500
1917-05-01 152.500
1917-06-01 152.500
1917-07-01 169.000
1917-08-01 169.000
1917-09-01 185.500
1917-10-01 185.500
1917-11-01 196.000
1917-12-01 196.000
1918-01-01 200.500
1918-02-01 200.500
1918-03-01 196.000
1918-04-01 196.000
1918-05-01 188.500
1918-06-01 188.500
1918-07-01 190.000
1918-08-01 190.000
1918-09-01 190.000
1918-10-01 190.000
1918-11-01 185.500
1918-12-01 185.500
1919-01-01 193.000
1919-02-01 193.000
1919-03-01 182.500
1919-04-01 182.500
1919-05-01 170.500
1919-06-01 170.500
1919-07-01 166.000
1919-08-01 166.000
1919-09-01 166.000
1919-10-01 166.000
1919-11-01 166.000
1919-12-01 166.000
1920-01-01 166.000
1920-02-01 166.000
1920-03-01 175.000
1920-04-01 175.000
1920-05-01 187.000
1920-06-01 187.000
1920-07-01 208.000
1920-08-01 208.000
1920-09-01 206.500
1920-10-01 206.500
1920-11-01 209.500
1920-12-01 209.500
1921-01-01 190.000
1921-02-01 190.000
1921-03-01 164.500
1921-04-01 164.500
1921-05-01 154.000
1921-06-01 154.000
1921-07-01 151.000
1921-08-01 151.000
1921-09-01 128.500
1921-10-01 128.500
1921-11-01 118.000
1921-12-01 118.000
1922-01-01 119.500
1922-02-01 119.500
1922-03-01 119.500
1922-04-01 119.500
1922-05-01 119.500
1922-06-01 119.500
1922-07-01 122.500
1922-08-01 122.500
1922-09-01 127.000
1922-10-01 127.000
1922-11-01 131.500
1922-12-01 131.500
1923-01-01 134.500
1923-02-01 134.500
1923-03-01 134.500
1923-04-01 134.500
1923-05-01 134.500
1923-06-01 134.500
1923-07-01 137.500
1923-08-01 137.500
1923-09-01 143.500
1923-10-01 143.500
1923-11-01 146.500
1923-12-01 146.500
1924-01-01 148.000
1924-02-01 148.000
1924-03-01 148.000
1924-04-01 148.000
1924-05-01 148.000
1924-06-01 148.000
1924-07-01 146.500
1924-08-01 146.500
1924-09-01 143.500
1924-10-01 143.500
1924-11-01 140.500
1924-12-01 140.500
1925-01-01 139.000
1925-02-01 139.000
1925-03-01 137.500
1925-04-01 137.500
1925-05-01 133.000
1925-06-01 133.000
1925-07-01 127.000
1925-08-01 127.000
1925-09-01 127.000
1925-10-01 127.000
1925-11-01 127.000
1925-12-01 127.000
1926-01-01 128.500
1926-02-01 128.500
1926-03-01 131.500
1926-04-01 131.500
1926-05-01 133.000
1926-06-01 133.000
1926-07-01 133.000
1926-08-01 133.000
1926-09-01 133.000
1926-10-01 133.000
1926-11-01 133.000
1926-12-01 133.000
1927-01-01 133.000
1927-02-01 133.000
1927-03-01 128.500
1927-04-01 128.500
1927-05-01 125.500
1927-06-01 125.500
1927-07-01 125.500
1927-08-01 125.500
1927-09-01 125.500
1927-10-01 125.500
1927-11-01 128.500
1927-12-01 128.500
1928-01-01 125.500
1928-02-01 125.500
1928-03-01 125.500
1928-04-01 125.500
1928-05-01 125.500
1928-06-01 125.500
1928-07-01 125.500
1928-08-01 125.500
1928-09-01 125.500
1928-10-01 125.500
1928-11-01 125.500
1928-12-01 125.500
1929-01-01 125.500
1929-02-01 125.500
1929-03-01 125.500
1929-04-01 125.500
1929-05-01 127.000
1929-06-01 127.000
1929-07-01 127.000
1929-08-01 127.000
1929-09-01 127.000
1929-10-01 127.000
1929-11-01 127.000
1929-12-01 127.000
1930-01-01 127.000
1930-02-01 127.000
1930-03-01 122.500
1930-04-01 122.500
1930-05-01 122.500
1930-06-01 122.500
1930-07-01 118.000
1930-08-01 118.000
1930-09-01 118.000
1930-10-01 118.000
1930-11-01 116.500
1930-12-01 116.500
1931-01-01 113.500
1931-02-01 113.500
1931-03-01 115.000
1931-04-01 115.000
1931-05-01 110.500
1931-06-01 110.500
1931-07-01 107.500
1931-08-01 107.500
1931-09-01 107.500
1931-10-01 107.500
1931-11-01 107.500
1931-12-01 107.500
1932-01-01 107.500
1932-02-01 107.500
1932-03-01 104.500
1932-04-01 104.500
1932-05-01 104.500
1932-06-01 94.0000
1932-07-01 94.0000
1932-08-01 94.0000
1932-09-01 94.0000
1932-10-01 94.0000
1932-11-01 94.0000
1932-12-01 94.0000
1933-01-01 94.0000
1933-02-01 94.0000
1933-03-01 94.0000
1933-04-01 94.0000
1933-05-01 94.0000
1933-06-01 94.0000
1933-07-01 101.500
1933-08-01 101.500
1933-09-01 101.500
1933-10-01 101.500
1933-11-01 101.500
1933-12-01 101.500
1934-01-01 101.500
1934-02-01 101.500
1934-03-01 101.500
1934-04-01 101.500
1934-05-01 101.500
1934-06-01 115.000
1934-07-01 115.000
1934-08-01 115.000
1934-09-01 115.000
1934-10-01 115.000
1934-11-01 115.000
1934-12-01 115.000
1935-01-01 115.000
1935-02-01 115.000
1935-03-01 115.000
1935-04-01 115.000
1935-05-01 115.000
1935-06-01 115.000
1935-07-01 115.000
1935-08-01 115.000
1935-09-01 115.000
1935-10-01 115.000
1935-11-01 115.000
1935-12-01 115.000
1936-01-01 115.000
1936-02-01 115.000
1936-03-01 115.000
1936-04-01 115.000
1936-05-01 115.000
1936-06-01 115.000
1936-07-01 117.000
1936-08-01 117.000
1936-09-01 117.000
1936-10-01 117.000
1936-11-01 125.000
1936-12-01 125.000
1937-01-01 125.000
1937-02-01 125.000
1937-03-01 125.000
1937-04-01 125.000
1937-05-01 125.000
1937-06-01 125.000
1937-07-01 125.000
1937-08-01 125.000
1937-09-01 125.000
1937-10-01 125.000
1937-11-01 125.000
1937-12-01 125.000
1938-01-01 125.000
1938-02-01 125.000
1938-03-01 125.000
1938-04-01 125.000