What was the percentage of votes for coakley when kennedy won 1.6%
CREATE TABLE "by_county" (
  "county" text,
  "coakley_pct" text,
  "coakley_votes" real,
  "brown_pct" text,
  "brown_votes" real,
  "kennedy_pct" text,
  "kennedy_votes" real
);
SELECT "coakley_pct" FROM "by_county" WHERE "kennedy_pct"='1.6%';