1956 01 99.99 -99.99   2.20 
1956 10 99.99 -99.99 -11.90 
1956 11 99.99 -99.99  -3.20 
1956 12 99.99 -99.99   2.70 
1957 01 99.99 -99.99   2.20 
1957 02 99.99 -99.99  -1.60 
1957 03 99.99 -99.99  -6.00 
1957 04 99.99 -99.99  -6.30 
1957 05 99.99 -99.99 -13.60 
1957 06 99.99 -99.99 -18.20 
1957 07 99.99 -99.99 -17.40 
1957 08 99.99 -99.99 -12.70 
1957 09 99.99 -99.99 -13.10 
1957 10 99.99 -99.99  -8.60 
1957 11 99.99 -99.99  -3.70 
1957 12 99.99 -99.99    .70 
1958 01 99.99 -99.99   1.40 
1958 02 99.99 -99.99  -2.90 
1958 03 99.99 -99.99  -5.90 
1958 04 99.99 -99.99  -8.80 
1958 05 99.99 -99.99  -9.00 
1958 06 99.99 -99.99 -22.90 
1958 07 99.99 -99.99 -16.10 
1958 08 99.99 -99.99 -20.10 
1958 09 99.99 -99.99 -19.90 
1958 10 99.99 -99.99 -13.20 
