A stock had returns of $1\mathrm{.}3$ percent, $8\mathrm{.}5$ percent, $6\mathrm{.}8$ percent, $3\mathrm{.}4$ percent, $10$ percent, and $19\mathrm{.}7$ percent over the past six years. What is the geometric average return for this time period? $\_\_\_\_\_\%$

Instruction: Enter your response as a percentage with two decimal places.

For example, if your answer is $0\mathrm{.}1213=12\mathrm{.}13\%,$ please only enter $"12\mathrm{.}13",$ please do not enter $"0\mathrm{.}1213"$ or $"12\mathrm{.}13\%",$ the system may not recognize the $\%$ sign. You may put negative signs if necessary,