A.1/5張 B.1/4張 C.1/3張 D.1/2張 E.2/3張
A.1~2個月 B.3~4個月 C.5~6個月 D.7~8個月 E.9~10個月
A.<5% B.5%~6% C.7%~8% D.9%~10% E.10%~12%