CREATE TABLE table_3210 ("Region" TEXT, "Median income  (  Intl.$  ) " FLOAT, "Below 40% of median income" TEXT, "Below 50% of median income" TEXT, "Below 60% of median income" TEXT)

In what region do 18.6% of the people make less than 50% of the median income?
SELECT "Region" FROM table_3210 WHERE "Below 50% of median income" = '18.6%'
SELECT "Region" FROM "table_3210" WHERE "Below 50% of median income" = '18.6%'