what ae all of the brazil 100% where the age group is 15-17?
CREATE TABLE "table1_18950570_4" (
  "age_group" text,
  "brazil_100pct_percent_of_the_population" text,
  "white_47_73pct_percent_in_the_race_percent_in_the_age_group" text,
  "black_7_61pct_percent_in_the_race_percent_in_the_age_group" text,
  "yellow_1_09pct_percent_in_the_race_percent_in_the_age_group" text,
  "brown_multiracial_43_13pct_percent_in_the_race_percent_in_the_age_group" text,
  "indians_0_43pct_percent_in_the_race_percent_in_the_age_group" text,
  "unspecified_0_0034pct" text
);
SELECT "brazil_100pct_percent_of_the_population" FROM "table1_18950570_4" WHERE "age_group"='15-17';