Consider a sample of year$-$end prices for Alphabet, Inc. $($Google$)$ over a five year period. Google did not pay a dividend over the sample period.

YEAR PRICE

$2012$ $$573\mathrm{.}85$

$2011$ $$601\mathrm{.}60$

$2010$ $$531\mathrm{.}33$

$2009$ $$342\mathrm{.}82$

$2008$ $$563\mathrm{.}24$

$2007$ $$508\mathrm{.}01$

Calculate the holding period return.