What was the average annual rate of return on long$-$term government bonds $(30-$year Treasury bonds$)$ during the period $1990$ to $2014?$

Group of answer choices

$5\mathrm{.}49\%$

$4\mathrm{.}14\%$

$5\mathrm{.}88\%$

$7\mathrm{.}82\%$