I do not think you should (or can ?) use Pivot.
Some formulas like these should give needed values.
Note:
$F4
refers to the cell containing "Proficient"
$F5
refers to the cell containing "Enhusiast"
$F6
refers to the cell containing "Amateur"
A$2:A$10
refers to your data
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…