CREATE TABLE table_204_843 (id DECIMAL, "volume" DECIMAL, "year" TEXT, "names" TEXT, "articles" DECIMAL, "pages" DECIMAL, "images" DECIMAL, "maps" DECIMAL, "number of copies" DECIMAL)

in what year were there the least number of images ?
SELECT "year" FROM table_204_843 ORDER BY "images" LIMIT 1
SELECT "year" FROM "table_204_843" ORDER BY "images" NULLS FIRST LIMIT 1