Under Armour, Incorporated is an American supplier of sportswear and casual apparel. Following are selected financial data for the company for the period $2009$ to $2013.$

$20092010201120122013$

Profit margin $(\%)5\mathrm{.}56\mathrm{.}46\mathrm{.}67\mathrm{.}07\mathrm{.}0$

Retention ratio $(\%)100\mathrm{.}0100\mathrm{.}0100\mathrm{.}0100\mathrm{.}0100\mathrm{.}0$

Asset turnover $($X$)1\mathrm{.}61\mathrm{.}61\mathrm{.}61\mathrm{.}61\mathrm{.}5$

Financial leverage $($X$)1\mathrm{.}71\mathrm{.}71\mathrm{.}91\mathrm{.}81\mathrm{.}9$

Growth rate in sales $(\%)18\mathrm{.}124\mathrm{.}238\mathrm{.}424\mathrm{.}627\mathrm{.}1$

a$.$ Calculate Under Armour$$s annual sustainable growth rate for the years $2009$ through $2013.$

Note: Round your answers to $1$ decimal place.