MORSE BLUFF, NEAlthough neighbors report that the Kenner family is "immensely troubled," recently published statistics suggest they are more or less average, sources reported Monday. "Sure, the kids are upset that Doug and Tammy are splitting up because of Doug's extramarital affairs, but that's hardly unusual," said analyst Doreen Fellows, who cited 2000 U.S. Census figures indicating that more than 60 percent of all American children are from divorced families. "Maybe the family would have fared better if not for Doreen's drinking, but the situation is far from unusual. According to the American Medical Association, 72 percent of American homes harbor someone with an addiction." Unbeknownst to the Kenners, one out of four family members will contract chlamydia in his or her lifetime.