According to the 2010 census, what was the population for the federal state that had less than -6 deputies required ignoring the limits?
CREATE TABLE "federal_representation" (
  "federal_state" text,
  "number_of_members" real,
  "pct_of_total_members" text,
  "population_on_the_census_also_called_censo_2010" text,
  "pct_of_the_population_censo_2010" text,
  "representativeness_inhabitants_mr" text,
  "representatives_of_national_average" text,
  "deputies_required_ignoring_the_limits" real
);
SELECT "population_on_the_census_also_called_censo_2010" FROM "federal_representation" WHERE "deputies_required_ignoring_the_limits"<-6;