CREATE TABLE table_203_355 (id DECIMAL, "year" DECIMAL, "total" DECIMAL, "romanians" TEXT, "hungarians" TEXT, "roma" TEXT)

what year had the highest total number ?
SELECT "year" FROM table_203_355 ORDER BY "total" DESC LIMIT 1
SELECT "year" FROM "table_203_355" ORDER BY "total" DESC NULLS LAST LIMIT 1