Below are stock prices and dividends for Perfect Option Football Corporation for $2004-2008$:

Price Dividend

$2004$ $$49\mathrm{.}10$

$2005$ $$52\mathrm{.}50$ $$1\mathrm{.}00$

$2006$ $$46\mathrm{.}00$ $$0\mathrm{.}80$

$2007$ $$54\mathrm{.}00$ $$2\mathrm{.}35$

$2008$ $$57\mathrm{.}00$ $$1\mathrm{.}32$

Calculate the standard deviation for Perfect Option stock over the time period.

Answer format: Percentage Round to: $2$ decimal places $($Example: $9\mathrm{.}24\%,\%$ sign required. Will accept decimal format rounded to $4$ decimal places $($ex: $0\mathrm{.}0924))$