1970 11  9.34   3.13   6.23 
1970 12  2.16  -4.00   -.91 
1971 01  -.11  -7.00  -3.55 
1971 02   .32  -6.86  -3.27 
1971 03  3.06  -1.66    .70 
1971 04  7.66   1.35   4.50 
1971 05 10.31   3.91   7.11 
1971 06 11.79   7.23   9.51 
1971 07 15.63  10.35  12.99 
1971 08 18.54  13.96  16.25 
1971 09 15.00   9.32  12.16 
1971 10 10.00   4.80   7.40 
1971 11  8.97   2.53   5.75 
1971 12  1.29  -5.29  -2.00 
1972 01 -1.04  -7.66  -4.35 
1972 02 -1.87 -10.40  -6.13 
1972 03  2.06  -5.95  -1.94 
1972 04  3.43  -1.90    .76 
1972 05  6.09    .75   3.42 
1972 06 14.29   7.08  10.68 
1972 07 15.80   9.55  12.67 
1972 08 17.12  12.05  14.59 
1972 09 14.74   8.43  11.59 
1972 10 11.74   4.62   8.18 
1972 11  5.43    .33   2.88 
1972 12  -.40  -8.78  -4.58 
1973 01  -.45  -7.37  -3.91 
1973 02  1.66  -5.48  -1.91 
1973 03   .71  -5.49  -2.38 
1973 04  3.99   -.96   1.51 
1973 05  8.51   2.62   5.56 
1973 06 10.47   6.06   8.26 
1973 07 16.92  11.97  14.44 
1973 08 15.55  10.44  12.99 
1973 09 14.87   9.72  12.29 
1973 10 10.59   5.45   8.02 
1973 11  6.37   1.59   3.98 
1973 12  5.54   -.62   2.46 
1974 01 -2.70  -9.18  -5.94 
1974 02  -.41  -7.56  -3.98 
1974 03   .38  -6.62  -3.12 
1974 04  4.54  -1.33   1.60 
1974 05  5.95    .77   3.36 
1974 06 10.91   5.47   8.18 
1974 07 14.60   9.24  11.92 
1974 08 16.70  11.69  14.19 
1974 09 15.13   9.67  12.40 
1974 10 11.22   5.36   8.29 
1974 11  6.39   1.28   3.83 
1974 12  3.35  -1.40    .97 
1975 01 -1.19  -8.60  -4.89 
1975 02 -4.76 -11.98  -8.37 
1975 03  1.61  -4.35  -1.36 
1975 04  4.53   -.56   1.98 
1975 05  7.17   1.71   4.44 
1975 06 10.33   3.81   7.07 
1975 07 16.15  11.06  13.60 
1975 08 17.44  11.40  14.42 
1975 09 15.53   9.85  12.69 
1975 10 10.28   4.09   7.18 
1975 11  6.85   1.09   3.97 
1975 12  2.38  -4.94  -1.28 
