86
        Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec
1961    -93     -105    -42     -29     15      40      76      63      12      -12     -29     -50
1962    -83     -87     -67     -35     11      49      64      78      30      42      -13     -28
1963    -94     -91     -63       4     7       52      68      72      42      7       -13     -65
1964    -57     -108    -58     -30     27      46      81      97      56      12      -6      -87
1965    -116    -83     -85     -33     12      57      77      96      60       3       2      -62
1966    -108    -101    -57     -30     2       64      63      62      33      20      -33     -51
1967    -73     -142    -54     -40     8       54      83      57      71      -3      -32     -52
1968    -97     -42     -69     -15     6       41      76      76      45      42      -20     -73
1969    -112    -100    -67     -29     19      39      70      83      51      28      -28     -75
1970    -120    -63     -81     -2      59      56      69      59      43      0       -15     -77
1971    -97     -73     -73     -47     50      48      50      74      51      4       -2      -64
1972    -61     -85     -63     -8      -2      48      76      71      33      -8      -21     -67
1973    -50     -96     75      -27     32      51      54      81      27      -9      -37     -73
1974    -85     -64     -47     -2      23      67      71      64      23      -18     -21     -44
1975    -83     -75     -85     -32     33      49      71      58      57      10      -58     -58
1976    -94     -63     -41     -50     0       44      68      74      40      8       -38     -68
1977    -62     -98     -35     -18     29      59      73      68      58      -2      -41     -60
1978    -95     -102    -81     -19     18      35      61      36      28      36      -25     -68
1979    -70     -44     -42     -29     26      51      82      76      24      17      -12     -82
1980    -90     -58     -56     -29      9      53      64      54      30      9       -12     -55
1981    -83     -78     -38     -39     23      70      58      65      55      2       -32     -52
1982    -106    -99     -69     -49     1       48      78      73      29      22      -14     -68
1983    -113    -90     -34     -29     8       78      64      66      52      29      -68     -57
1984    -67     -106    -68     -33     29      58      57      77      75      28      -6      -54
1985    -82     -117    -57     2       29      42      73      63      56      10      -44     -55
1986    -63     -77     -77     -50     37      46      61      56      60      38      -23     -64
1987    -83     -134    -47     -15     41      44      68      80      40      -4      -23     -43
1988    -87     -83     -42     7       26      52      65      92      61      -1      -26     -65
1989    -92     -63     -116    -42     03      58      103     68      78      -3      -31     -68
1990    -49     -82     -73     -28     32      49      98      94      43      1       -72     -76