1981 01 99.99 -99.99  -2.60 
1981 02 99.99 -99.99   1.40 
1981 03 99.99 -99.99   8.60 
1981 04 99.99 -99.99  10.40 
1981 05 99.99 -99.99  15.90 
1981 06 99.99 -99.99  19.90 
1981 07 99.99 -99.99  20.29 
1981 08 99.99 -99.99  20.00 
1981 09 99.99 -99.99  17.10 
1981 10 99.99 -99.99  12.40 
1981 11 99.99 -99.99   4.90 
1981 12 99.99 -99.99    .40 
1982 01 99.99 -99.99  -2.90 
1982 02 99.99 -99.99   -.60 
1982 03 99.99 -99.99   5.80 
1982 04 99.99 -99.99   8.39 
1982 05 99.99 -99.99  16.70 
1982 06 99.99 -99.99  19.79 
1982 07 99.99 -99.99  21.00 
1982 08 99.99 -99.99  20.60 
1982 09 99.99 -99.99  19.20 
1982 10 99.99 -99.99  12.10 
1982 11 99.99 -99.99   5.60 
1982 12 99.99 -99.99   3.70 
1983 01 99.99 -99.99   4.00 
1983 02 99.99 -99.99   -.30 
1983 03 99.99 -99.99   7.40 
1983 04 99.99 -99.99  13.10 
1983 05 99.99 -99.99  17.50 
1983 06 99.99 -99.99  18.70 
1983 07 99.99 -99.99  23.00 
1983 08 99.99 -99.99  20.70 
1983 09 99.99 -99.99  16.20 
1983 10 99.99 -99.99  10.50 
1983 11 99.99 -99.99   1.80 
1983 12 99.99 -99.99    .40 
1984 01 99.99 -99.99    .20 
1984 02 99.99 -99.99    .80 
1984 03 99.99 -99.99   5.20 
1984 04 99.99 -99.99  10.40 
1984 05 99.99 -99.99  15.40 
1984 06 99.99 -99.99  17.60 
1984 07 99.99 -99.99  19.20 
1984 08 99.99 -99.99  19.79 
1984 09 99.99 -99.99  16.90 
1984 10 99.99 -99.99  12.40 
1984 11 99.99 -99.99   5.30 
1984 12 99.99 -99.99    . 0 
1985 01 99.99 -99.99  -5.70 
1985 02 99.99 -99.99  -4.69 
1985 03 99.99 -99.99   4.30 
1985 04 99.99 -99.99  11.10 
1985 05 99.99 -99.99  16.90 
1985 06 99.99 -99.99  16.70 
1985 07 99.99 -99.99  21.10 
1985 08 99.99 -99.99  20.40 
1985 09 99.99 -99.99  16.10 
1985 10 99.99 -99.99  10.10 
1985 11 99.99 -99.99   4.10 
1985 12 99.99 -99.99   5.00 
1986 01 99.99 -99.99    .90 
1986 02 99.99 -99.99  -3.40 
1986 03 99.99 -99.99   3.30 
1986 04 99.99 -99.99  12.70 
1986 05 99.99 -99.99  17.70 
1986 06 99.99 -99.99  18.70 
1986 07 99.99 -99.99  19.90 
1986 08 99.99 -99.99  21.50 
1986 09 99.99 -99.99  15.80 
1986 10 99.99 -99.99   9.50 
1986 11 99.99 -99.99   4.30 
1986 12 99.99 -99.99   -.30 
1987 01 99.99 -99.99  -4.40 
1987 02 99.99 -99.99    . 0 
1987 03 99.99 -99.99   -.10 
1987 04 99.99 -99.99  10.90 
1987 05 99.99 -99.99  13.80 
1987 06 99.99 -99.99  19.00 
1987 07 99.99 -99.99  22.20 
1987 08 99.99 -99.99  17.79 
1987 09 99.99 -99.99  18.40 
1987 10 99.99 -99.99  11.70 
1987 11 99.99 -99.99   5.50 
1987 12 99.99 -99.99   2.09 
1988 01 99.99 -99.99   3.10 
1988 02 99.99 -99.99   3.20 
1988 03 99.99 -99.99   5.10 
1988 04 99.99 -99.99  10.00 
1988 05 99.99 -99.99  16.00 
1988 06 99.99 -99.99  18.40 
1988 07 99.99 -99.99  22.00 
1988 08 99.99 -99.99  20.29 
1988 09 99.99 -99.99  15.40 
1988 10 99.99 -99.99   9.70 
1988 11 99.99 -99.99   -.90 
1988 12 99.99 -99.99   2.00 
1989 01 99.99 -99.99   -.50 
1989 02 99.99 -99.99   4.69 
1989 03 99.99 -99.99   8.30 
1989 04 99.99 -99.99  12.50 
1989 05 99.99 -99.99  15.10 
1989 06 99.99 -99.99  17.20 
1989 07 99.99 -99.99  20.80 
1989 08 99.99 -99.99  19.79 
1989 09 99.99 -99.99  15.80 
1989 10 99.99 -99.99  10.30 
1989 11 99.99 -99.99   3.70 
1989 12 99.99 -99.99   1.70 
1990 01 99.99 -99.99    .10 
1990 02 99.99 -99.99   4.80 
1990 03 99.99 -99.99   8.39 
1990 04 99.99 -99.99  10.50 
1990 05 99.99 -99.99  16.50 
1990 06 99.99 -99.99  18.50 
1990 07 99.99 -99.99  19.79 
1990 08 99.99 -99.99  20.60 
1990 09 99.99 -99.99  14.20 
1990 10 99.99 -99.99  10.40 
1990 11 99.99 -99.99   5.50 
1990 12 99.99 -99.99    .60 
