1973 10 12.07 -17.81 -14.94 
1974 02 29.96 -35.25 -32.61 
1974 03 22.69 -29.65 -26.17 
1974 08  8.33   4.78   6.55 
1974 12 27.36 -32.61 -29.98 
1975 02 29.92 -34.46 -32.18 
1975 03 28.42 -34.46 -31.43 
1975 05 -5.11 -10.44  -7.77 
1975 08  8.37   3.85   6.10 
1980 10 -7.15 -12.31  -9.73 
1981 06  2.52   -.52   1.00 
1986 07  8.63   4.96   6.80 
1987 09  1.85  -1.44    .20 
1987 10 -8.10 -14.58 -11.34 
1987 11 22.79 -29.09 -25.94 
1987 12 28.36 -33.20 -30.78 
1988 02 26.04 -31.89 -28.96 
1988 03 27.16 -34.00 -30.58 
1988 06  2.98    .-1   1.48 
1988 09   .85  -4.05  -1.60 
1988 10 12.00 -17.70 -14.85 
1988 11 21.72 -27.73 -24.72 
1988 12 18.59 -26.17 -22.38 
1989 01 29.62 -35.30 -32.46 
1989 02 28.58 -34.25 -31.41 
1989 03 22.25 -31.41 -26.83 
1989 11 26.28 -32.00 -29.14 
1989 12 25.24 -31.20 -28.22 
1990 01 27.70 -33.16 -30.43 
1990 02 25.96 -31.57 -28.76 
1990 09  3.13    .29   1.71 
1990 10 11.32 -15.86 -13.59 
1990 11 27.70 -31.25 -29.47 
1990 12 28.57 -34.63 -31.60 
1991 01 30.56 -35.00 -32.78 
1991 02 33.75 -39.06 -36.41 
1991 05 -7.03 -11.88  -9.45 
1991 10 12.89 -19.62 -16.26 
1992 11 23.60 -28.83 -26.21 
1993 02 27.97 -34.45 -31.21 
1993 04 17.37 -25.31 -21.34 
