Question: What is every value for % 20-39 if  % 0-19 is 21,11%?
Schema: create table table_23606500_4 (_percentage_20_39 varchar, _percentage_0_19 varchar, PRIMARY KEY (_percentage_20_39))
SQL: select _percentage_20_39 from table_23606500_4 where _percentage_0_19 = "21,11%"