1957 02 -1.52  -6.32  -3.92 
1957 03 -9.12 -14.90 -12.01 
1957 04 16.42 -22.23 -19.32 
1957 05 18.87 -26.05 -22.46 
1957 06 17.65 -23.70 -20.67 
1957 07 22.37 -29.79 -26.08 
1957 08 22.54 -32.03 -27.28 
1957 09 17.87 -28.31 -23.09 
1957 10 12.91 -22.13 -17.52 
1957 11 -3.10 -11.80  -7.45 
1957 12  2.27  -4.05   -.89 
1958 01  2.49  -4.00   -.75 
1958 02   .26  -4.76  -2.25 
1958 03 -5.88  -9.97  -7.93 
1958 04 11.38 -17.27 -14.32 
1958 05 20.26 -27.12 -23.69 
1958 06 18.96 -26.86 -22.91 
1958 07 24.07 -33.00 -28.53 
1958 08 21.86 -29.16 -25.51 
1958 09 21.33 -30.85 -26.09 
1958 10 13.28 -24.27 -18.77 
1958 11 -3.80 -14.41  -9.10 
1958 12   . 5  -7.17  -3.56 
1959 01  2.38  -4.27   -.94 
1959 02 -1.36  -5.44  -3.40 
1959 03 -7.85 -11.23  -9.54 
1959 04 15.04 -19.83 -17.43 
1959 05 20.81 -26.20 -23.50 
1959 06 20.00 -25.87 -22.93 
1959 07 19.04 -27.25 -23.14 
1959 08 26.27 -35.83 -31.05 
1959 09 19.86 -31.69 -25.77 
1959 10 17.87 -28.79 -23.33 
1959 11 -7.95 -14.51 -11.23 
1959 12  1.38  -4.94  -1.78 
1960 01   .43  -4.62  -2.09 
1960 02 -2.28  -6.30  -4.29 
1960 03 10.64 -15.16 -12.90 
1960 04 17.23 -23.84 -20.53 
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1960 06 19.89 -28.98 -24.43 
1960 07 24.96 -32.87 -28.91 
1960 08 20.92 -29.99 -25.45 
1960 09 18.21 -29.62 -23.92 
1960 10 11.99 -21.31 -16.65 
1960 11 -4.08 -13.54  -8.80 
1960 12  1.33  -5.78  -2.22 
1961 01  2.40  -4.44  -1.02 
1961 02  -.85  -5.44  -3.14 
1961 03 -6.86 -11.76  -9.31 
1961 04 11.49 -18.09 -14.79 
1961 05 17.48 -24.87 -21.17 
1961 06 19.34 -26.59 -22.96 
1961 07 20.80 -28.91 -24.85 
1961 08 24.59 -33.71 -29.15 
1961 09 17.20 -27.07 -22.13 
1961 10 12.91 -23.33 -18.11 
1961 11 -3.42 -12.73  -8.07 
1961 12   .96  -6.83  -2.93 
1962 01  1.68  -6.56  -2.44 
1962 02  -.22  -5.79  -3.00 
1962 03 -9.18 -14.44 -11.81 
1962 04 16.87 -23.82 -20.34 
1962 05 20.20 -28.55 -24.37 
1962 06 21.29 -31.09 -26.19 
1962 07 24.28 -34.11 -29.19 
1962 08 21.31 -30.25 -25.78 
1962 09 21.79 -31.82 -26.80 
1962 10 14.01 -26.77 -20.39 
1962 11 -3.34 -13.61  -8.47 
1962 12   .17  -7.24  -3.53 
1963 01  2.39  -5.00  -1.30 
1963 02 -1.13  -6.40  -3.76 
1963 03 -7.95 -12.95 -10.45 
1963 04 15.41 -21.89 -18.65 
1963 05 18.25 -25.10 -21.67 
1963 06 18.87 -28.31 -23.59 
1963 07 20.18 -30.66 -25.42 
1963 08 18.42 -26.54 -22.48 
1963 09 16.96 -27.78 -22.37 
1963 10 13.31 -22.63 -17.96 
1963 11 -3.20  -9.76  -6.48 
1963 12   .56  -5.54  -2.49 
1964 01   .74  -4.39  -1.82 
1964 02 -2.36  -5.88  -4.12 
1964 10 13.23 -21.58 -17.40 
1964 11 -3.45 -11.97  -7.71 
1964 12  1.19  -3.97  -1.39 
1965 01  1.95  -3.68   -.86 
1965 10 12.26 -19.62 -15.94 
1965 11 -6.05 -11.88  -8.96 
1965 12   .48  -3.35  -1.43 
1966 01   .33  -2.74  -1.20 
1966 02 -1.73  -4.75  -3.24 
1966 10 14.28 -21.73 -18.00 
1966 11 -4.78 -10.83  -7.80 
1966 12   .33  -4.02  -1.84 
1967 01  1.65  -1.13    .26 
1967 11 -5.60 -12.11  -8.85 
1967 12  1.15  -3.25  -1.04 
1968 01   .99  -3.06  -1.03 
1968 02 -1.28  -4.29  -2.78 
1968 11 -6.08 -12.95  -9.51 
1968 12  -.70  -4.81  -2.75 
1969 01   .90  -3.29  -1.19 
1969 11 -5.68 -10.79  -8.23 
1969 12   .57  -4.16  -1.79 
1970 01  1.61  -2.51   -.45 
1970 11 -5.65 -12.49  -9.07 
1970 12   .90  -2.61   -.85 
1971 01  1.77  -2.57   -.39 
1971 11 -5.21 -13.11  -9.16 
1971 12   .52  -4.69  -2.08 
1972 01  1.44  -1.90   -.22 
1972 11 -4.65 -11.83  -8.24 
1972 12   .87  -4.34  -1.73 
1973 01  1.66  -2.71   -.52 
