CREATE TABLE table_16087 ("Year" FLOAT, "Games" FLOAT, "Games started" FLOAT, "Completions" FLOAT, "Attempts" FLOAT, "Completion %" TEXT, "Yards" FLOAT, "Yards/Attempt" TEXT, "Touchdowns" FLOAT, "Interceptions" FLOAT, "Rating" TEXT)

How many years were there with 348 attempts?
SELECT COUNT("Yards") FROM table_16087 WHERE "Attempts" = '348'
SELECT COUNT("Yards") FROM "table_16087" WHERE "Attempts" = '348'