The historical returns of CBA in the last ten years are listed below:

$-19\mathrm{.}1\%16\mathrm{.}5\%17\mathrm{.}9\%-49\mathrm{.}6\%43\mathrm{.}4\%$

$1\mathrm{.}7\%-16\mathrm{.}4\%45\mathrm{.}7\%44\mathrm{.}9\%-3\mathrm{.}5\%$

The difference between the arithmetic and geometric average return of CBA over this ten year period is