CREATE TABLE table_203_830 (id DECIMAL, "year" DECIMAL, "song" TEXT, "chart positions\ us country" DECIMAL, "chart positions\ can country" DECIMAL, "album" TEXT)

which years saw the release of three singles ?
SELECT "year" FROM table_203_830 GROUP BY "year" HAVING COUNT("song") = 3
SELECT "year" FROM "table_203_830" GROUP BY "year" HAVING COUNT("song") = 3