1911    74.590                                                         
 1912    78.720                                                         
 1913    75.931                                                         
 1914    82.470                                                         
 1915    89.840                                                         
 1916    84.000                                                         
 1919    88.050                                                         
 1920    88.620                                                         
 1921    89.620                                                         
 1922    94.480                                                         
 1923    90.950                                                         
 1924    98.230                                                         
 1925   101.130                                                         
 1926    95.904                                                         
 1927    97.545                                                         
 1928    99.482                                                         
 1929    97.585                                                         
 1930   100.448                                                         
 1931    96.629                                                         
 1932   104.114                                                         
 1933   104.162                                                         
 1934   104.863                                                         
 1935   106.240                                                         
 1936   109.069                                                         
 1937   113.580                                                         
 1938   117.200                                                         
 1939   115.035                                                         
 1940   114.277                                                         
 1941   115.117                                                         
 1946   114.820                                                         
 1947   116.338                                                         
 1948   119.814                                                         
 1949   121.327                                                         
 1950   124.002                                                         
 1951   126.244                                                         
 1952   128.922                                                         
 1953   128.740                                                         
 1954   130.840                                                         
 1955   128.209                                                         
 1956   128.490                                                         
 1957   135.601                                                         
 1958   133.791                                                         
 1959   138.857                                                         
 1960   138.767                                                         
 1961   139.130                                                         
 1962   140.293                                                         
 1963   143.137                                                         
 1964   147.350                                                         
 1965   151.388                                                         
 1966   144.317                                                         
 1967   151.207                                                         
 1968   152.882                                                         
 1969   156.867                                                         
 1970   155.749                                                         
 1971   157.735