1970 10 99.99 -20.03 -99.99 
1970 12 23.80 -34.29 -29.04 
1971 01 36.20 -46.30 -41.25 
1971 02 21.66 -37.32 -29.49 
1971 04   .81 -25.09 -12.14 
1971 05 10.61  -2.85   3.88 
1971 08 17.66   2.49  10.07 
1971 09  9.31  -1.70   3.80 
1971 10 -4.33 -21.54 -12.93 
1971 11 16.21 -27.69 -21.95 
1972 01 31.05 -39.14 -35.09 
1972 02 20.82 -36.61 -28.71 
1972 03 15.73 -35.78 -25.75 
1972 04 -3.38 -17.60 -10.49 
1972 06 16.76   5.46  11.11 
1972 07 21.59   6.05  13.82 
1972 09  8.10  -4.44   1.83 
1972 10 -2.22 -10.27  -6.24 
1972 12 19.45 -30.41 -24.93 
1973 02 17.75 -36.09 -26.92 
1973 04  3.02 -15.61  -6.29 
1973 05 13.12  -1.62   5.75 
1973 06 20.07   3.77  11.92 
1973 08 15.69    .77   8.22 
1973 09 11.81  -3.98   3.91 
1973 10 -5.42 -16.77 -11.09 
1973 11 20.88 -32.02 -26.45 
1973 12 13.16 -27.71 -20.43 
1974 01 28.79 -38.37 -33.58 
1974 02 27.12 -44.05 -35.58 
1974 03 99.99 -29.38 -99.99 
1974 04  1.89 -14.77  -6.44 
1974 05 14.69  -3.59   5.55 
1974 06 17.86   3.65  10.75 
1974 07 19.60 -99.99 -99.99 
1974 08 18.23   5.85  12.04 
1974 10 -4.61 -14.20  -9.40 
1974 11 18.19 -26.22 -22.20 
1974 12 23.38 -31.80 -27.59 
1975 01 23.88 -33.09 -28.48 
1975 02 13.89 -23.89 -18.89 
1975 03 -7.09 -19.33 -13.21 
1975 04 -1.60 -14.70  -8.14 
1975 06 18.77   5.93  12.35 
1975 07 22.04   9.51  15.77 
1975 08 16.90   5.72  11.31 
1975 09  6.88   -.57   3.15 
1975 10 -3.30 -11.73  -7.51 
1975 11 16.71 -26.43 -21.57 
1975 12 23.23 -30.98 -27.10 
1976 01 19.21 -26.82 -23.02 
1976 02 20.36 -32.71 -26.53 
1976 03 -8.32 -19.21 -13.77 
1976 04  3.90  -8.55  -2.32 
1976 05 11.29    .75   6.02 
1976 06 18.74   8.54  13.64 
1976 07 20.39   8.63  14.51 
1976 08 20.63   5.81  13.21 
1976 09 11.77   -.26   5.75 
1976 10 -2.49 -10.34  -6.41 
1976 11 -4.73 -14.78  -9.76 
1976 12 14.54 -25.12 -19.83 
1977 01 -8.45 -17.45 -12.95 
1977 02 -7.70 -18.45 -13.08 
1977 03 11.57 -26.09 -18.83 
1977 05 11.35   -.48   5.43 
1977 06 19.33   5.80  12.56 
1977 07 22.78   6.90  14.84 
1977 08 21.68   5.92  13.80 
1977 09 10.07  -2.08   3.99 
1977 10 -1.52 -12.18  -6.85 
1977 11 17.24 -26.53 -21.88 
1977 12 22.80 -28.82 -25.81 
1978 01 10.14 -18.87 -14.51 
1978 02 12.40 -22.90 -17.65 
1978 03 -6.70 -20.65 -13.67 
1978 04  2.41 -10.24  -3.91 
1978 05 12.54  -1.24   5.65 
1978 06 16.20   5.14  10.67 
1978 07 21.38   7.72  14.54 
1978 08 19.43   4.15  11.79 
1978 09 12.58   -.32   6.13 
1978 10 -4.54 -14.28  -9.41 
1978 11 -9.16 -19.46 -14.31 
1978 12 14.10 -24.05 -19.07 
1979 01 12.68 -23.04 -17.86 
1979 02 22.22 -36.45 -29.33 
1979 03 -8.16 -21.32 -14.74 
1979 04  -.39 -12.76  -6.57 
1979 05 14.43   1.07   7.75 
1979 06 17.26   5.68  11.47 
1979 07 19.69   7.49  13.59 
1979 08 19.23   6.86  13.04 
1979 09 10.72  -1.80   4.46 
1979 10   .87  -6.78  -2.95 
1979 11 -3.98 -13.01  -8.49 
1979 12 24.18 -33.34 -28.76 
1980 01 22.03 -31.61 -26.82 
1980 02 -7.94 -20.06 -14.00 
1980 03 -6.64 -18.12 -12.38 
1980 04  1.62  -9.68  -4.03 
1980 05 14.29   2.48   8.38 
1980 06 17.08   5.94  11.51 
1980 07 20.23   8.28  14.25 
1980 08 16.09   3.26   9.67 
