A stock had returns of $13\mathrm{.}8$ percent, $13\mathrm{.}2$ percent, $-1\mathrm{.}2$ percent, $3\mathrm{.}8$ percent, $2\mathrm{.}6$ percent, and $13\mathrm{.}1$ 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,