Answer
$41.53\,\text{ years}^2$
Work Step by Step
The variance has the square of the units of measure of the data items in the sample (here: $\text{ years}^2$).
It can be obtained by invoking the "Descriptive Statistics" option of our Data Analysis feature to obtain a summary shown below in the attached screen snippet.
The variance is
$$s^{2}=41.53\,\text{ years}^2.$$
