CREATE TABLE table_36883 ("Source" TEXT, "Date" TEXT, "MARTIN" TEXT, "GR\\u00dcNE" TEXT, "Others" TEXT, "Undecided" TEXT)

What is the Date when MARTIN had 8%?
SELECT "Date" FROM table_36883 WHERE "MARTIN" = '8%'
SELECT "Date" FROM "table_36883" WHERE "MARTIN" = '8%'