1972 04  9.00   2.32   5.66 
1972 05 16.68   8.14  12.41 
1972 06 16.66  10.39  13.52 
1972 07 20.08  12.33  16.20 
1972 08 20.81  12.96  16.88 
1972 09 16.89   9.21  13.04 
1972 10 13.89   5.80   9.84 
1972 11  8.60   4.59   6.60 
1972 12  5.62    .70   3.16 
1973 01  6.08   1.13   3.60 
1973 02  9.03   2.57   5.80 
1973 03  8.85   3.31   6.08 
1973 04 12.17   4.39   8.28 
1973 05 15.15   7.03  11.09 
1973 06 15.73   9.07  12.40 
1973 07 18.48  11.45  14.96 
1973 08 17.01  10.70  13.85 
1973 09 18.06  11.14  14.60 
1973 10 12.50   7.02   9.76 
1973 11  7.00   1.51   4.25 
1973 12  7.71   3.68   5.69 
1974 01  6.25    .95   3.60 
1974 02  6.15   1.72   3.93 
1974 03  8.09   2.28   5.18 
1974 04 10.37   5.17   7.77 
1974 05 12.32   6.35   9.33 
1974 06 16.23   9.76  12.99 
1974 07 17.84  11.24  14.54 
1974 08 19.04  12.65  15.85 
1974 09 20.91  11.87  16.39 
1974 10 14.09   7.41  10.75 
1974 11  8.57   4.17   6.37 
1974 12  7.56   3.66   5.61 
1975 01  4.42    .83   2.63 
1975 02  5.63    .96   3.29 
1975 03  8.35   1.22   4.79 
1975 04  9.99   2.89   6.44 
1975 05 13.57   6.84  10.20 
1975 06 15.25   9.67  12.46 
1975 07 18.34  12.10  15.22 
1975 08 16.33  11.75  14.04 
1975 09 19.89  10.52  15.20 
1975 10 11.96   7.25   9.60 
1975 11  8.31   3.61   5.96 
1975 12  6.81   1.81   4.31 
1976 01  6.75   1.98   4.36 
1976 02  6.72   1.37   4.04 
1976 03  7.01   1.36   4.18 
1976 04 12.50   3.68   8.09 
1976 05 13.35   6.85  10.10 
