1972 05 16.32   7.95  12.13 
1972 06 12.76   6.16   9.46 
1972 07 11.85   4.75   8.30 
1972 08 12.84   5.83   9.33 
1972 09 20.07   6.90  13.48 
1972 10 99.99   7.84 -99.99 
1972 11 18.00   8.72  13.36 
1972 12 22.42  10.81  16.61 
1973 01 25.77  13.49  19.63 
1973 02 23.18  13.56  18.37 
1973 03 18.33  10.36  14.34 
1973 04 18.31  10.60  14.45 
1973 05 13.78 -99.99 -99.99 
1973 06 10.67 -99.99 -99.99 
1973 07 11.97   6.32   9.14 
1973 08 11.54   5.54   8.54 
1973 09 14.27 -99.99 -99.99 
1973 10 16.86   8.96  12.91 
1973 11 15.81   8.59  12.20 
1973 12 21.46  11.12  16.28 
1974 01 24.60 -99.99 -99.99 
1974 02 22.87 -99.99 -99.99 
1974 03 23.88  14.57  19.22 
1974 04 16.85  11.33  14.09 
1974 05 14.78   9.13  11.95 
1974 06 11.97   6.79   9.38 
1974 08 10.88 -99.99 -99.99 
1974 09 12.34   5.89   9.11 
1974 11 16.58   7.80  12.19 
1974 12 19.89   9.32  14.60 
