A stock has annual returns of $7\mathrm{.}9$ percent, $22\mathrm{.}2$ percent, $-15\mathrm{.}4.$ percent, $17\mathrm{.}5$ percent, and $21\mathrm{.}6$ percent for the past five years. What is the geometric average return for the period is percent. Show your answer to the nearest. $01\%,$ do not use the $\%$ sign in your answer. If the answer is negative, use the $-$ sign.