Database: retail_complains
Question: List the top five cities in terms of the number of 5-star ratings in 2016 reviews, in descending order.
SQL: SELECT T2.city FROM reviews AS T1 INNER JOIN district AS T2 ON T1.district_id = T2.district_id WHERE T1.Stars = 5 AND T1.Date LIKE '2016%' ORDER BY T1.Date DESC LIMIT 5