You decided to purchase Dips Inc. stock five years ago. $($The stock has had annual returns of $9$ percent, $7$ percent, $-2$ percent, $7$ percent, and $3$ percent for the past five years, respectively. What is the standard deviation of returns for this stock? $($Do not round intermediate calculations. Input your final answer as a percent, not decimal. Roumd your final answer to two decimal places i$.$e$.12\mathrm{.}34.$ Do not input a percent sign with your final answer.$)$