1968 03 33.77  20.03  26.90 
1968 04 31.28  17.29  24.28 
1968 05 26.78  13.09  19.93 
1968 06 24.16  13.12  18.64 
1968 07 23.34   9.60  16.47 
1968 08 24.18   9.31  16.74 
1968 09 28.10  12.54  20.32 
1968 10 32.40  14.66  23.53 
1968 11 36.46  16.70  26.58 
1968 12 38.32  18.09  28.20 
1969 01 39.65 -99.99 -99.99 
1969 02 37.71 -99.99 -99.99 
1969 03 37.68 -99.99 -99.99 
1969 04 34.86 -99.99 -99.99 
1969 05 28.99 -99.99 -99.99 
1969 06 24.82 -99.99 -99.99 
1969 07 25.54 -99.99 -99.99 
1969 08 28.12 -99.99 -99.99 
1969 09 29.93 -99.99 -99.99 
1969 10 34.75 -99.99 -99.99 
1969 11 37.74 -99.99 -99.99 
1969 12 36.70 -99.99 -99.99 
1970 01 38.63  19.71  29.17 
1970 02 36.71  22.27  29.49 
1970 03 38.14  21.34  29.74 
1970 04 33.75  19.41  26.58 
1970 05 25.98  13.19  19.58 
1970 06 25.88  12.30  19.09 
1970 07 26.05  10.38  18.21 
1970 08 27.56  11.35  19.45 
1970 09 27.36  12.72  20.04 
1970 10 33.93  16.50  25.22 
1970 11 34.93  17.04  25.98 
1970 12 38.39  20.45  29.42 
1971 01 36.70  21.56  29.13 
1971 02 38.20  22.46  30.33 
1971 03 36.18  21.98  29.08 
1971 04 32.90  16.60  24.75 
1971 05 27.73  14.47  21.10 
1971 06 24.43  10.72  17.57 
1971 07 25.46  11.86  18.66 
1971 08 26.41  11.78  19.09 
1971 09 29.44  12.39  20.91 
1971 10 31.18  14.43  22.80 
1971 11 31.56  15.21  23.38 
