table does not exist

Question

CREATE OR REPLACE PROCEDURE ProcedureX()
    TYPE AVERAGE_COUNT_TBL IS TABLE OF INTEGER;
    AVERAGE_COUNT AVERAGE_COUNT_TBL;
BEGIN
    INSERT INTO AVERAGE_COUNT 
    VALUES(10);
END ProcedureX;

It throws the error: PL/SQL: ORA-00942: table or view does not exist

What is the problem?