CREATE TABLE table_204_115 (id DECIMAL, "year" DECIMAL, "track" TEXT, "number" DECIMAL, "team" TEXT, "car" TEXT, "round result" TEXT)

which year had a higher round placement , 2006 or 2010 ?
SELECT "year" FROM table_204_115 WHERE "year" IN (2006, 2010) ORDER BY "round result" LIMIT 1
SELECT "year" FROM "table_204_115" WHERE "year" IN (2006, 2010) ORDER BY "round result" NULLS FIRST LIMIT 1