CREATE TABLE table_35712 ("Province" TEXT, "Kibaki" TEXT, "Raila" TEXT, "Wamalwa" TEXT, "Ngilu" TEXT, "Others" TEXT, "Registered Voters" TEXT, "Turnout %" TEXT)

What's listed for the Turnout % with a Ngilu of 30,535?
SELECT "Turnout %" FROM table_35712 WHERE "Ngilu" = '30,535'
SELECT "Turnout %" FROM "table_35712" WHERE "Ngilu" = '30,535'