SELECT "year" FROM table_204_438 WHERE "album" = 'changes' AND "us dance" IS NULL
which years did the album changes not make it on the us dance list ?
CREATE TABLE table_204_438 (
    id number,
    "year" number,
    "title" text,
    "album" text,
    "us r&b" number,
    "us pop" number,
    "us dance" number
)