Using the table$$ below, compute the standard deviation of the returns.

State of the Economy Probability $(\%)$ Projected Return $(\%)$

Recession $12-9\mathrm{.}00$

Moderate $19-3\mathrm{.}00$

Average $4510\mathrm{.}00$

Good $1714\mathrm{.}00$

Excellent $733\mathrm{.}00$

Express your answer in percentage terms, rounded to two decimal places $($i$.$e$.$ X$.$YY$).$