From 2016 to 2019, how many users each year were asked the question 13?
From 2016 to 2019 refer to SurveyID 2016 BETWEEN 2019; Question 13 refer to QuestionID
SELECT SurveyID, COUNT(UserID) FROM Answer WHERE QuestionID = 13 AND SurveyID BETWEEN 2016 AND 2019 GROUP BY SurveyID