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]]