Calculate the arithmetic average return, given annual returns of:

Year $17\mathrm{.}84\%$

Year $26\mathrm{.}10\%$

Year $3-8\mathrm{.}33\%$

Year $45\mathrm{.}81\%$

Year $55\mathrm{.}57\%$

Round the answer to two decimals places in percentage form. Please write $\%$ sign in the "units" box.