1968   5
          40          26          19          37          26
  41.5        31.9        39.6        35.8        45.1      
  39.5        32.2        38.5        36.8        44.9      
  40.1        32.1        34.9        38.1        40.0      
  40.1        31.1        36.4        34.0        36.7      
  39.5        31.1        38.8        36.8        37.2      
  40.7        33.5        38.2        39.0        36.5      
  39.8        33.9        36.4        36.6        37.1      
  40.6        34.6        36.2        39.5        33.1      
  42.2        34.9        32.9        39.4        30.3      
  39.8        34.2        31.5        40.7        30.3      
  38.6        33.1        33.0        39.6        32.0      
  35.5        35.3        28.8        35.6        31.8      
  35.9        35.6        26.8        36.1        30.1      
  36.0        37.0        21.0        37.0        30.1      
  37.3        34.2        19.9        36.0        30.1      
  34.2        29.9        18.5        34.4        28.1      
  34.1        30.4        13.9        35.4        29.0      
  36.1        29.8        11.5        36.4        28.0      
  36.2        28.8        11.5        35.0        26.3      
  38.1        25.3         0.0        35.8        24.6      
  36.6        21.4         0.0        36.5        21.2      
  35.1        18.8         0.0        33.7        20.5      
  33.4        16.8         0.0        31.5        18.0      
  28.8        15.4         0.0        28.2        16.0      
  25.6        11.5         0.0        27.5        11.9      
  24.2         8.8         0.0        27.8        12.9      
  24.2         0.0         0.0        26.0         0.0      
  24.3         0.0         0.0        24.0         0.0      
  23.5         0.0         0.0        24.3         0.0      
  23.7         0.0         0.0        21.2         0.0      
  23.1         0.0         0.0        17.8         0.0      
  21.8         0.0         0.0        16.1         0.0      
  19.8         0.0         0.0        15.1         0.0      
  19.5         0.0         0.0        11.5         0.0      
  16.4         0.0         0.0         9.7         0.0      
  14.6         0.0         0.0         9.0         0.0      
  12.3         0.0         0.0         8.6         0.0      
  11.7         0.0         0.0         0.0         0.0      
  10.8         0.0         0.0         0.0         0.0      
  11.6         0.0         0.0         0.0         0.0