CREATE TABLE table_9514 ("Party" TEXT, "Leader" TEXT, "Seats" TEXT, "% of seats" TEXT, "First Pref votes" TEXT, "% FPv" TEXT)

Which Leader has Spoilt Votes as % of Seats?
SELECT "Leader" FROM table_9514 WHERE "% of seats" = 'spoilt votes'
SELECT "Leader" FROM "table_9514" WHERE "% of seats" = 'spoilt votes'