Context: The list below displays the top-ranked country from each year of the Human Development Index. Norway has been ranked the highest twelve times, Canada eight times, followed by Japan which has been ranked highest three times. Iceland has been ranked highest twice.

Question: Which country has been ranked highest the most number of times?
Answer: Norway

Question: Which country has received the top rank twice?
Answer: Iceland

Question: Which country has been ranked lowest the most number of times?
Answer: Unanswerable

Question:  Which country has received the bottom rank twice?
Answer: Unanswerable