Calculate the arithmetic average of the following returns.

Year Return

$10\mathrm{.}26$

$20\mathrm{.}1$

$30\mathrm{.}06$

$4-0\mathrm{.}14$

$50\mathrm{.}12$

Enter the answer with $4$ decimals, e$.$g$.0\mathrm{.}1234.$