SELECT YEAR FROM TABLE;
IF (YEAR =  2015)
{ // do something }
ELSE IF (YEAR = 2016)
{ // do something }

DECLARE @CurrYear INT;

SELECT @CurrYear = YEAR
FROM TABLE;

IF (@CurrYear =  2015)
     -- do something
ELSE IF (@CurrYear = 2016)
     -- do something else

DELIMITER //
CREATE PROCEDURE Years ( yr INT )
  BEGIN
    IF yr = 2015 THEN
      SELECT or whatever ...;
    ELSEIF yr = 2016 THEN
       DO something else...;
    END IF;
  END //
DELIMITER ;