1917   6.70000                         
1918   7.80000                         
1919   7.80000                         
1920   8.76000                         
1921   11.2800                         
1922   9.76000                         
1923   9.28000                         
1924   10.2200                         
1925   11.0900                         
1926   7.64000                         
1927   8.63000                         
1928   8.66000                         
1929   9.26000                         
1930   7.21000                         
1931   7.50000                         
1932   8.60000                         
1933   8.98000                         
1934   8.38000                         
1935   7.46000                         
1936   7.15000                         
1937   7.40000                         
1938   8.04000