Calculate the real return for each year. (A negative answer should be indicated by a minus sign. Leave no cells blank - be certain to enter "0" wherever required. Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)

Year	Real return
1	%
2	%
3	%
4	%
5	%
6	%
7	%
8	%

Consider the following table for an eight-year period:

Year	T-bill return		Inflation
1	7.33	%	8.67	%
2	8.24		12.30
3	5.91		6.90
4	5.27		4.90
5	5.49		6.66
6	7.84		8.98
7	10.60		13.25
8	12.30		12.48

What is the average real return for Treasury bills? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Average real return for Treasury bills %