--same CTEs, different main query
SELECT
	Say.M,
	ROUND(AVG(Say.Votes)) Votes,
	ROUND(AVG(CASE Split.Y WHEN 04 THEN  Split.Votes END)) V_04,
	ROUND(AVG(CASE Split.Y WHEN 05 THEN  Split.Votes END)) V_05,
	ROUND(AVG(CASE Split.Y WHEN 14 THEN  Split.Votes END)) V_14,
	ROUND(AVG(CASE Split.Y WHEN 15 THEN  Split.Votes END)) V_15,
	ROUND(AVG(Say.Replies)) Replies,
	ROUND(AVG(CASE Split.Y WHEN 04 THEN  Split.Replies END)) R_04,
	ROUND(AVG(CASE Split.Y WHEN 05 THEN  Split.Replies END)) R_05,
	ROUND(AVG(CASE Split.Y WHEN 14 THEN  Split.Replies END)) R_14,
	ROUND(AVG(CASE Split.Y WHEN 15 THEN  Split.Replies END)) R_15
FROM
	Split,
	Split Say --Split All Years
WHERE
	Say.M = Split.M
GROUP BY
	Say.M
ORDER BY
	Say.M;