1971 12 10.73 -21.53 -16.13 
1972 01 14.79 -28.27 -21.53 
1972 02 11.84 -22.07 -16.95 
1972 03 -6.95 -17.46 -12.20 
1972 04   .18 -14.98  -7.39 
1972 05  9.13  -1.48   3.82 
1972 06 14.09   2.42   8.25 
1972 07 21.67   5.55  13.61 
1972 08 17.62   5.35  11.48 
1972 09 10.18    .26   5.22 
1972 10  2.31  -5.51  -1.60 
1972 11 -5.84 -16.48 -11.16 
1972 12 12.09 -24.30 -18.19 
1973 01 15.15 -26.03 -20.59 
1973 02 11.27 -24.93 -18.10 
1973 03 -1.31 -13.34  -7.32 
1973 04  4.03  -5.47   -.71 
1973 05  9.54  -1.17   4.17 
1973 06 14.30   3.58   8.94 
1973 07 16.21   5.73  10.97 
1973 08 15.12   4.12   9.62 
1973 09 12.00   -.36   5.82 
1973 10  1.01  -7.01  -3.00 
1973 11 12.25 -21.51 -16.88 
1973 12 10.52 -21.31 -15.91 
1974 01 20.65 -30.18 -25.41 
1974 02 10.80 -21.30 -16.04 
1974 03 -3.81 -15.43  -9.62 
1974 04  4.27  -6.63  -1.18 
1974 05 11.93  -1.40   5.26 
1974 06 16.67   3.11   9.89 
1974 07 18.43   4.86  11.64 
1974 08 19.21   3.40  11.31 
1974 09 13.60    .54   7.07 
1974 10  2.55  -5.32  -1.38 
1974 11 -4.52 -13.97  -9.24 
1974 12 -7.95 -15.63 -11.79 
