How many households are in Ottawa?
CREATE TABLE "oklahoma_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 SUM("number_of_households") FROM "oklahoma_counties_ranked_by_per_capita_i" WHERE "county"='ottawa';