1977 02  2.89  -7.52  -2.31 
1977 03 99.99 -14.51 -99.99 
1977 11 -8.83 -22.54 -15.68 
1977 12 14.16 -25.96 -20.06 
1978 01 -7.86 -18.41 -13.13 
1978 02 -3.35 -14.97  -9.16 
1978 03  2.93 -12.67  -4.87 
1978 04  9.31  -5.64   1.83 
1978 11 -1.61 -15.22  -8.41 
1978 12 -6.98 -16.76 -11.87 
1979 01 -7.46 -19.29 -13.37 
1979 02 12.14 -33.72 -22.93 
1979 03  3.14 -11.39  -4.12 
1979 04  7.82  -4.32   1.75 
1979 11  1.05  -7.34  -3.14 
1980 01 11.79 -22.70 -17.24 
1980 02   .41 -12.59  -6.09 
1980 03  2.06 -13.61  -5.77 
1980 11 -1.82 -12.46  -7.14 
1980 12 23.87 -32.28 -28.07 
1981 01   .21  -8.52  -4.15 
1981 02 -1.24 -11.16  -6.20 
1981 03  5.85  -7.41   -.78 
1981 04  8.47  -7.00    .73 
1981 11 -6.28 -16.60 -11.44 
1981 12 10.30 -21.20 -15.75 
1982 01 17.58 -29.51 -23.54 
1982 02 -5.47 -21.31 -13.39 
1982 03   .65 -12.37  -5.86 
1982 04  5.59  -7.36   -.88 
1982 11 -7.02 -17.01 -12.01 
1982 12 -7.20 -16.70 -11.95 
1983 01 11.08 -22.75 -16.91 
1983 02 -4.02 -17.57 -10.79 
1983 03  3.44 -14.44  -5.50 
1983 11 -5.32 -14.46  -9.89 
1983 12 -9.84 -19.21 -14.53 
1984 01 -7.82 -19.87 -13.85 
1984 02 -6.45 -18.12 -12.28 
1984 03  5.51  -9.85  -2.17 
1984 11 -6.24 -18.07 -12.15 
1984 12 -9.22 -17.50 -13.36 
1985 01 -1.38 -10.12  -5.75 
1985 02 -8.74 -23.23 -15.98 
1985 03  1.01 -14.80  -6.89 
1985 11 -9.80 -23.48 -16.64 
1985 12 99.99 -10.10 -99.99 
1986 02 -3.33 -17.93 -10.63 
1986 03  1.55 -18.45  -8.45 
1986 04  4.06 -11.20  -3.57 
1986 11 -3.24 -12.42  -7.83 
1987 02 -2.94 -14.88  -8.91 
1987 03  2.67 -16.89  -7.10 
1987 11 -2.57 -11.69  -7.12 
1988 02 -2.39 -15.07  -8.72 
1988 03  3.51  -7.84  -2.16 
1988 11 -5.99 -17.04 -11.51 
1988 12 99.99 -15.53 -99.99 
