CREATE TABLE table_66278 ("Date Released" TEXT, "Polling institute" TEXT, "Social Democratic" TEXT, "Socialist" TEXT, "Green-Communist" TEXT, "People's Party" TEXT, "Left Bloc" TEXT, "Lead" TEXT)

What is the date released when the Left Bloc had 3.2%?
SELECT "Date Released" FROM table_66278 WHERE "Left Bloc" = '3.2%'
SELECT "Date Released" FROM "table_66278" WHERE "Left Bloc" = '3.2%'