1987 11 -5.62 -10.46  -8.04 
1987 12 -8.14 -17.12 -12.64 
1988 01 -6.41 -12.12  -9.26 
1988 02 -7.44 -12.12  -9.78 
1988 03 -2.80  -8.26  -5.53 
1988 04  1.72  -5.61  -1.94 
1988 05 12.99   2.53   7.76 
1988 06 19.02   9.47  14.25 
1988 07 22.91  13.29  18.10 
1988 08 15.19   9.33  12.26 
1988 09 11.77   5.43   8.60 
1988 10  4.12  -1.75   1.18 
1988 11 -5.66 -12.11  -8.88 
1988 12 -8.22 -15.77 -12.00 
1989 01 -3.20  -9.89  -6.55 
1989 02 -2.35  -8.26  -5.31 
1989 03   .52  -3.71  -1.59 
1989 04  6.80   -.65   3.07 
1989 05 13.10   3.30   8.20 
1989 06 19.49   9.66  14.57 
1989 07 18.99   9.89  14.44 
1989 08 16.85   8.82  12.83 
1989 09 11.83   5.25   8.54 
1989 10  2.29  -1.60    .34 
1989 11 -1.33  -5.71  -3.52 
1989 12 -7.58 -13.50 -10.54 
1990 01 11.01 -16.79 -13.90 
1990 02   .39  -3.50  -1.55 
1990 03  -.21  -7.75  -3.98 
1990 04  6.95  -1.64   2.65 
1990 05 10.18    .91   5.55 
1990 06 16.11   6.63  11.37 
1990 07 17.71   9.89  13.80 
1990 08 16.62   8.60  12.61 
1990 09  8.12   2.13   5.12 
1990 10  3.24  -1.65    .79 
1990 11 -5.00 -11.03  -8.01 
1990 12 -2.49  -8.02  -5.25 
