CREATE TABLE table_203_70 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

how many counties have at least one silver medal ?
SELECT COUNT("rank") FROM table_203_70 WHERE "silver" >= 1
SELECT COUNT("rank") FROM "table_203_70" WHERE "silver" >= 1