If the speaker is Munu Adhi (2) K. Rajaram, what is the election year maximum?
CREATE TABLE "table1_23512864_4" (
  "election_year" real,
  "assembly" text,
  "winning_party_coalition" text,
  "chief_minister" text,
  "speaker" text
);
SELECT MAX("election_year") FROM "table1_23512864_4" WHERE "speaker"='Munu Adhi (2) K. Rajaram';