CREATE TABLE table_31670 ("Year" TEXT, "Broadcast date" TEXT, "BBC One total viewing" TEXT, "BBC One Rank" TEXT, "BBC Two total viewing" TEXT, "BBC Two Rank" TEXT)

How much is the total BBC 2 viewing in 1999?
SELECT "BBC Two total viewing" FROM table_31670 WHERE "Year" = '1999'
SELECT "BBC Two total viewing" FROM "table_31670" WHERE "Year" = '1999'