1972 04 20.80 -28.30 -24.55 
1972 05 -8.39 -15.40 -11.90 
1972 06  1.80  -3.60   -.90 
1972 07  8.60   1.70   5.15 
1972 08  5.00   -.10   2.45 
1972 09 -2.20  -6.60  -4.40 
1972 10 12.40 -20.20 -16.29 
1972 11 22.20 -28.80 -25.50 
1972 12 23.70 -31.30 -27.50 
1973 01 27.90 -35.09 -31.50 
1973 02 30.00 -36.80 -33.40 
1973 03 32.09 -38.00 -35.05 
1973 04 18.20 -26.30 -22.25 
1973 05 -5.20 -11.60  -8.39 
1973 06  6.40    .40   3.40 
1973 07  8.00   2.20   5.10 
1973 08  6.20   1.80   4.00 
1973 09  1.40  -2.80   -.70 
1973 10 -6.40 -11.80  -9.10 
1973 11 15.60 -21.40 -18.50 
1973 12 21.10 -27.50 -24.30 
1974 01 27.10 -33.70 -30.40 
1974 02 31.00 -36.20 -33.59 
1974 03 29.70 -35.30 -32.50 
1974 04 22.10 -29.40 -25.75 
1974 05 -7.40 -12.60 -10.00 
1974 06   .20  -4.10  -1.95 
1974 07  7.10   1.90   4.50 
1974 08  4.69    .10   2.39 
1974 09 -1.90  -6.30  -4.10 
1974 10 15.80 -20.70 -18.25 
1974 11 22.40 -28.90 -25.65 
1974 12 30.70 -37.30 -34.00 
1975 01 35.20 -40.70 -37.95 
1975 02 28.10 -34.40 -31.25 
1975 03 26.40 -32.30 -29.34 
1975 04 15.00 -22.00 -18.50 
1975 05 -5.10 -10.70  -7.89 
1975 06  5.20    .40   2.80 
1975 07  8.30   1.80   5.05 
1975 09 -1.90  -7.20  -4.54 
1975 10 10.30 -16.70 -13.50 
1975 11 21.60 -27.30 -24.45 
1975 12 27.10 -33.30 -30.20 
1976 01 31.10 -37.59 -34.34 
1976 02 31.00 -36.70 -33.84 
1976 03 28.60 -34.80 -31.70 
1976 04 14.80 -22.00 -18.40 
