What is the highest number of households with a median household income of $31,176, and a population of 25,607?
CREATE TABLE "missouri_counties_ranked_by_per_capita_i" (
  "county" text,
  "per_capita_income" text,
  "median_household_income" text,
  "median_family_income" text,
  "population" real,
  "number_of_households" real
);
SELECT MAX("number_of_households") FROM "missouri_counties_ranked_by_per_capita_i" WHERE "median_household_income"='$31,176' AND "population"<'25,607';