1967 12  2.33  -4.14   -.90 
1968 01 -3.50 -10.51  -7.00 
1968 02 -3.07 -10.59  -6.83 
1968 03  6.05  -2.86   1.59 
1968 04 14.83   2.56   8.69 
1968 05 16.12   5.75  10.94 
1968 06 23.80  12.04  17.92 
1968 07 26.41  13.95  20.18 
1968 08 25.94  14.29  20.11 
1968 09 23.14  12.56  17.85 
1968 10 15.72   6.47  11.09 
1968 11  7.47    .26   3.86 
1968 12   .-4  -7.03  -3.53 
1969 01  -.85  -8.43  -4.64 
1969 02  -.29  -7.36  -3.82 
1969 03  3.68  -4.94   -.63 
1969 04 13.70   1.96   7.83 
1969 05 18.57   6.19  12.38 
1969 06 22.09  11.69  16.89 
1969 07 26.71  15.12  20.91 
1969 08 27.69  14.63  21.16 
1969 09 21.67  11.21  16.44 
1969 10 14.13   4.92   9.53 
1969 11  6.95    .27   3.61 
1969 12 -1.74  -7.94  -4.84 
1970 01 -5.35 -13.70  -9.52 
1970 02 -1.35  -9.60  -5.48 
1970 03  1.92  -5.17  -1.62 
1970 04 13.33   2.13   7.73 
1970 05 19.54   8.22  13.88 
1970 06 24.35  12.26  18.30 
1970 07 26.13  15.75  20.93 
1970 08 26.76  14.58  20.67 
1970 09 21.70  11.76  16.73 
1970 10 15.58   7.73  11.65 
1970 11  7.79   1.89   4.84 
1970 12   .60  -5.84  -2.62 
1971 01 -3.73 -10.03  -6.88 
1971 02  -.95  -7.09  -4.02 
1971 03  1.81  -5.11  -1.65 
1971 04 10.47   -.52   4.97 
1971 05 18.56   5.09  11.82 
1971 06 25.59  13.26  19.42 
1971 07 26.34  13.76  20.04 
1971 08 25.72  13.08  19.40 
1971 09 22.40  13.14  17.77 
1971 10 18.74   8.18  13.46 
1971 11  7.57   -.49   3.54 
1971 12  4.21  -3.19    .51 
1972 01  -.79  -8.80  -4.79 
1972 02 -2.10 -10.61  -6.35 
1972 03  1.34  -6.18  -2.41 
1972 04  9.60   -.46   4.57 
1972 06 21.65  11.45  16.54 
1972 07 26.17  15.01  20.59 
1972 08 24.74  13.73  19.23 
1972 09 21.40  11.57  16.48 
1972 12  2.00  -4.61  -1.30 
1973 01   .41  -7.10  -3.34 
1973 02 -1.85 -10.78  -6.31 
1973 03  8.97   -.12   4.42 
1973 04 12.04   2.40   7.22 
1973 05 16.10   6.62  11.36 
1973 06 24.39  13.99  19.18 
1973 07 27.12  15.53  21.32 
1973 08 27.24  15.45  21.34 
1973 09 22.95  10.09  16.52 
1973 10 17.17   6.04  11.60 
1973 11  7.95    .83   4.39 
1973 12   .52  -6.22  -2.85 
1974 01  -.47  -8.18  -4.32 
1974 02 -2.32 -10.85  -6.58 
1974 03  3.76  -4.00   -.12 
1974 04 13.26   1.74   7.50 
1974 05 17.20   5.04  11.12 
1974 06 23.10  11.95  17.52 
1974 07 26.54  13.61  20.07 
1974 08 26.29  14.46  20.37 
1974 09 19.95   8.59  14.27 
1974 10 13.87   3.02   8.44 
1974 11  7.49    .38   3.93 
1974 12  1.74  -3.87  -1.06 
1975 01  1.15  -5.84  -2.34 
1975 02  -.18  -6.21  -3.19 
1975 03  2.03  -5.27  -1.62 
1975 04  8.29  -1.60   3.34 
1975 05 22.27   9.37  15.82 
1975 06 24.30  13.59  18.94 
1975 07 27.36  13.90  20.63 
1975 08 25.41  14.60  20.00 
1975 09 18.62   8.83  13.72 
1975 10 15.74   5.65  10.69 
1975 11 11.47   3.02   7.24 
1975 12  1.05  -6.83  -2.88 
1976 01 -2.87 -12.02  -7.44 
1976 02  3.42  -6.27  -1.42 
1976 03  6.83  -2.16   2.33 
1976 04 12.99   1.83   7.41 
1976 05 17.19   5.84  11.51 
1976 06 26.27  13.27  19.77 
1976 07 25.81  14.34  20.07 
1976 08 24.89  12.48  18.68 
1976 09 20.97   8.62  14.79 
1976 10 12.21   2.72   7.46 
1976 11  4.51  -3.62    .44 
1976 12 -1.45 -10.52  -5.98 
1977 01 -6.56 -99.99 -99.99 
1977 02 -1.70  -8.81  -5.25 
1977 03  7.92  -1.79   3.06 
