CREATE TABLE table_203_528 (id DECIMAL, "year" DECIMAL, "political rights" DECIMAL, "civil liberties" DECIMAL, "status" TEXT, "president" TEXT)

how many years was ali saibou president ?
SELECT COUNT("year") FROM table_203_528 WHERE "president" = 'ali saibou'
SELECT COUNT("year") FROM "table_203_528" WHERE "president" = 'ali saibou'