On January $1,2014,$ Tong purchased a ten$-$year bond bought at par. The bond pays semiannual coupons. Because Tong is an actuary, he enjoys calculating duration as a hobby. Tong calculated the Macaulay duration of the bond as $6\mathrm{.}806$ years on January $1,2016$ after receiving the coupon on January $1,2016.$

Calculate the Macaulay duration $($in years$)$ of the bond on January $1,2016$ right before receiving the coupon.

A

$6\mathrm{.}66$

B

$6\mathrm{.}91$

C

$7\mathrm{.}00$

D

$13\mathrm{.}53$

E

$13\mathrm{.}70$