problem: Compute the average real return for Treasury bills over this period. [Refer table given below]. [Negative value should be indicated by a minus sign. Give your answer to two decimal places]
Refer to the following table:
Year

Tbill return

Inflation

1976

0.0507

0.0486

1977

0.0545

0.0670

1978

0.0764

0.0902

1979

0.1056

0.1329

1980

0.1210

0.1252

1981

0.1460

0.0892

1982

0.1094

0.0383

1983

0.0899

0.0379

Do not include the percent sign (%).
Average real returns _____%