1968 05 15.37   3.97   9.67 
1968 06 23.41  10.59  17.00 
1968 07 26.70  12.33  19.51 
1968 08 25.42  11.89  18.65 
1968 09 22.41  10.66  16.53 
1968 10 15.56   5.26  10.41 
1968 11  4.91  -1.04   1.93 
1968 12 -1.94  -9.32  -5.63 
1969 01 -2.69 -11.04  -6.86 
1969 02 -1.38 -11.00  -6.19 
1969 03  1.04  -7.69  -3.32 
1969 04 12.57    .50   6.53 
1969 05 18.29   4.42  11.36 
1969 06 99.99   9.43 -99.99 
1969 07 99.99  12.60 -99.99 
1969 08 27.33  13.25  20.29 
1969 09 21.12   8.97  15.04 
1969 10 13.10   3.29   8.19 
1969 11  5.78    .16   2.97 
1969 12 -3.23 -10.65  -6.93 
1970 01 -6.26 -16.46 -11.36 
1970 02 -2.66 -13.07  -7.86 
1970 03  1.16  -8.60  -3.71 
1970 04 12.62    .11   6.36 
1970 05 18.70   6.20  12.45 
1970 06 24.22  11.07  17.64 
1970 07 26.15  14.34  20.24 
1970 08 26.26  12.41  19.33 
1970 09 20.40  10.48  15.44 
1970 10 14.49   5.41   9.95 
1970 11  6.55    .15   3.35 
1970 12 -2.36 -11.53  -6.95 
1971 01 -5.55 -15.72 -10.63 
1971 02 -1.62 -10.63  -6.12 
1971 03   . 2  -9.14  -4.56 
1971 04  9.14  -1.31   3.91 
1971 05 18.29   4.14  11.21 
1971 06 25.62 -99.99 -99.99 
1971 07 25.32 -99.99 -99.99 
1971 08 25.23 -99.99 -99.99 
1971 09 22.73 -99.99 -99.99 
1971 11  6.16 -99.99 -99.99 
1972 02 -4.12 -14.46  -9.29 
1972 03 -1.51  -9.97  -5.74 
1972 04  7.95  -2.77   2.59 
1972 05 19.75   5.59  12.67 
1972 06 20.85   9.29  15.07 
1972 07 25.81  13.19  19.50 
1972 08 24.33  12.32  18.32 
1972 09 21.49   9.87  15.68 
1972 10 11.03   1.83   6.43 
1972 11  3.44  -1.21   1.11 
1972 12  -.90  -6.79  -3.84 
1973 01 -1.52  -8.18  -4.85 
1973 02 -3.47 -13.87  -8.67 
1973 05 16.49 -99.99 -99.99 
1973 06 24.30  12.91  18.60 
1973 07 26.91  13.67  20.29 
1973 08 26.52  15.71  21.11 
1973 09 21.32   8.80  15.06 
1973 10 16.59   5.68  11.13 
1973 11  6.13   -.21   2.96 
1973 12 -1.27  -8.08  -4.67 
1974 01 -3.13 -10.62  -6.87 
1974 02 -4.62 -13.22  -8.92 
1974 03  1.77  -4.91  -1.57 
1974 04 12.70   1.15   6.92 
1974 05 15.14   4.42   9.78 
1974 06 22.73  10.98  16.85 
1974 07 25.50  13.25  19.37 
1974 08 25.27  11.92  18.59 
1974 09 19.06   6.89  12.97 
1974 10 12.79   1.17   6.98 
1974 11  4.89  -1.08   1.90 
1975 01 -1.04  -9.60  -5.32 
