CREATE TABLE table_name_33 (decile VARCHAR(255), roll VARCHAR(255), area VARCHAR(255), name VARCHAR(255))
How many values for decile occur in Mount Roskill with Monte Cecilia school with a roll greater than 170?
    
SQL: SELECT COUNT(decile) FROM table_name_33 WHERE area = "mount roskill" AND name = "monte cecilia school" AND roll > 170