Albert the turtle was born with $1$ square on his shell, as in the first picture below. When he was $1$ year old, $8$ new squares appeared around the old squares, as in the second picture below. Each year, a new group of squares appeared around the old squares.
**How many new squares appeared on Albert's shell each year? Extend the pattern and fill in the blanks in the chart below.**


Age | New squares
:-: | :-:
$1$ | $8$
$2$ | [[☃ math-keypad 1]]
$3$ | [[☃ math-keypad 2]]