CREATE TABLE table_74092 ("Episode" TEXT, "Date" TEXT, "Official ITV1 rating  ( millions ) " TEXT, "Weekly rank" FLOAT, "Share  ( % ) " TEXT, "Official ITV1 HD rating  ( millions ) " TEXT, "Total ITV1 viewers  ( millions ) " TEXT)

What was the official ITV1 HD rating in millions for the episode that had an official ITV1 rating of 8.98 million?
SELECT "Official ITV1 HD rating (millions)" FROM table_74092 WHERE "Official ITV1 rating (millions)" = '8.98'
SELECT "Official ITV1 HD rating (millions)" FROM "table_74092" WHERE "Official ITV1 rating (millions)" = '8.98'