1968 01 -6.97 -99.99 -99.99 
1968 02 -4.96 -99.99 -99.99 
1968 05 18.02 -99.99 -99.99 
1968 06 24.54 -99.99 -99.99 
1969 12 -2.19 -11.53  -6.85 
1970 01 -8.09 -22.23 -15.16 
1970 02 -3.01 -18.81 -10.91 
1970 03  1.65 -99.99 -99.99 
1971 04 11.58   -.49   5.54 
1971 05 18.64 -99.99 -99.99 
1971 07 25.38 -99.99 -99.99 
1972 01 10.41 -23.12 -16.76 
1972 02 -7.52 -22.37 -14.94 
1972 03   .37 -10.18  -4.90 
1972 04  8.53  -1.85   3.34 
1972 08 25.05 -99.99 -99.99 
1972 12 -8.35 -19.23 -13.79 
1973 01 -4.94 -16.16 -10.55 
1973 02 -2.83 -15.26  -9.04 
1973 05 18.37 -99.99 -99.99 
1973 06 26.31  12.55  19.43 
1973 07 26.84  15.11  20.97 
1973 09 19.60   9.58  14.59 
1973 11  3.50  -4.40   -.45 
1973 12 -5.49 -14.74 -10.11 
1974 01 -8.14 -19.50 -13.82 
1974 02 -4.17 -18.06 -11.11 
1974 06 24.83 -99.99 -99.99 
1975 01 -5.56 -99.99 -99.99 
1975 06 23.35 -99.99 -99.99 
1978 02 -6.19 -21.18 -13.68 
