what ae all of the brazil 100% where the age group is 15-17?
create table table_18950570_4 (brazil_100_percentage__percent_of_the_population_ varchar, age_group varchar, PRIMARY KEY (brazil_100_percentage__percent_of_the_population_))
select brazil_100_percentage__percent_of_the_population_ from table_18950570_4 where age_group = "15-17"