CREATE TABLE table_35715 ("Province" TEXT, "Kibaki" TEXT, "Raila" TEXT, "Wamalwa" TEXT, "Ngilu" TEXT, "Others" TEXT, "Registered Voters" TEXT, "Turnout %" TEXT)

What's listed for the Wamalwa that has a Turnout % of 55.9%?
SELECT "Wamalwa" FROM table_35715 WHERE "Turnout %" = '55.9%'
SELECT "Wamalwa" FROM "table_35715" WHERE "Turnout %" = '55.9%'