What shows for 2000 at the Fort Peck Indian Reservation, Montana, when the 1979 is less than 26.8?
CREATE TABLE "changes_in_poverty_rates_on_largest_rese" (
  "reservation" text,
  "location" text,
  "1969" real,
  "1979" real,
  "1989" real,
  "2000" real
);
SELECT AVG("2000") FROM "changes_in_poverty_rates_on_largest_rese" WHERE "location"='montana' AND "reservation"='fort peck indian reservation' AND "1979"<26.8;