Consider the following table for a seven$-$year period:

$\backslash$table$[[$Returns$],[$Year$,$U$.$S$.$ Treasury,Inflation$],[$Bills$,-1\mathrm{.}26\%,],[1,4\mathrm{.}00\%,-2\mathrm{.}40],[2,3\mathrm{.}85,-1\mathrm{.}30],[3,4\mathrm{.}75,0\mathrm{.}72],[4,5\mathrm{.}17,-6\mathrm{.}54],[5,2\mathrm{.}97,-9\mathrm{.}46],[6,1\mathrm{.}85,-1\mathrm{.}41],[7,1\mathrm{.}58,]]$

What was the average real return for Treasury bills for this time period?