1968 09 99.99  13.35 -99.99 
1968 10 99.99   8.64 -99.99 
1968 12 10.50   -.75   4.87 
1969 01  9.60   -.80   4.40 
1969 02  9.34    .58   4.96 
1969 03 12.34    .90   6.62 
1969 04 22.04  10.91  16.47 
1969 05 27.24  14.32  20.78 
1969 06 31.73  17.96  24.84 
1969 07 34.49  20.97  27.73 
1969 08 31.38  17.94  24.66 
1969 09 27.91  14.68  21.29 
1969 10 23.68   8.38  16.03 
1969 11 15.68    .73   8.20 
1969 12  8.28  -2.36   2.95 
1970 01  6.49  -5.15    .66 
1970 02 10.40   -.57   4.91 
1970 03 14.35   3.65   9.00 
1970 04 23.79  11.64  17.71 
1970 05 28.48  15.18  21.83 
1970 06 30.70  17.54  24.12 
1970 07 31.74  19.14  25.43 
1970 08 31.25  20.92  26.08 
1970 09 30.61  18.99  24.80 
1970 10 22.11  10.31  16.21 
1970 11 15.26   4.71   9.98 
1970 12 13.65   2.65   8.14 
1971 01  9.22  -1.10   4.06 
1971 02 11.31   -.44   5.43 
1971 03 14.77   2.95   8.86 
1971 04 23.18   8.54  15.86 
1971 05 25.84  12.55  19.19 
1971 06 32.73  20.54  26.63 
1971 07 32.04  20.68  26.36 
1971 08 30.40  19.43  24.91 
1971 09 29.94  18.02  23.98 
1971 10 28.56  13.65  21.10 
1971 11 17.21   4.88  11.04 
1971 12 14.74   5.74  10.24 
1972 01 10.34    .49   5.41 
1972 02 13.56    .51   7.03 
1972 03 17.78   5.73  11.75 
1972 04 24.56  10.99  17.77 
1972 05 28.26  15.01  21.63 
1972 06 32.18  18.36  25.27 
1972 07 31.64  20.23  25.93 
1972 08 32.65  19.99  26.32 
1972 09 30.33  19.16  24.74 
1972 10 22.98  11.09  17.03 
1972 11 12.70   4.11   8.40 
1972 12  8.76   -.10   4.33 
1973 01  8.55   -.88   3.83 
1973 02 11.26    .18   5.72 
1973 03 19.25   9.50  14.37 
1973 04 20.56  10.39  15.47 
1973 05 26.47  15.06  20.76 
1973 06 32.66  20.72  26.68 
1973 07 33.53  22.49  28.00 
1973 08 31.69  19.79  25.74 
1973 09 28.79  19.33  24.06 
1973 10 26.20  13.50  19.85 
1973 11 99.99   7.95 -99.99 
1973 12 11.04   1.23   6.13 
1974 01  9.77   1.77   5.77 
1974 02 13.08   2.00   7.54 
1974 03 20.04   7.95  14.00 
1974 04 22.60   9.60  16.10 
1974 05 27.41  16.00  21.70 
1974 06 29.10  17.17  23.13 
1974 07 33.99  21.08  27.53 
1974 08 30.56  19.76  25.16 
1974 09 24.60  13.36  18.98 
1974 10 23.99   8.43  16.21 
1974 11 16.71   5.64  11.17 
1974 12 11.26   1.13   6.19 
1975 01 12.21   1.67   6.94 
1975 02 11.94   1.59   6.76 
1975 03 13.77   3.83   8.80 
1975 04 21.39  10.41  15.90 
1975 05 27.55  17.57  22.56 
1975 06 31.12  19.33  25.22 
1975 07 32.98  20.46  26.72 
1975 08 31.68  20.82  26.25 
1975 09 26.37  14.27  20.32 
1975 10 24.94  11.26  18.10 
1975 12 10.54   2.36   6.45 
1976 01 10.01  -1.14   4.43 
1976 02 17.53   5.82  11.67 
1976 03 20.11   9.14  14.62 
1976 04 23.10  11.42  17.26 
1976 05 23.73  12.51  18.11 
1976 06 29.11  18.58  23.84 
1976 07 32.40  20.99  26.69 
1976 08 30.90  18.03  24.46 
1976 09 27.89  14.73  21.31 
1976 10 21.13   7.81  14.46 
1977 01  2.39 -99.99 -99.99 
1978 01  3.53 -99.99 -99.99 
