Nu Skin Enterprises, Inc. posted a 13% rise in annual revenue of $1.74 billion, according to the company. For the fourth quarter, sales rose 23% to $495.3 million. “We are extremely pleased with our quarterly and 2011 results,” said Truman Hunt, president and chief executive officer. “By all measures, 2011 was a record year. We’re also optimistic that our momentum will continue into 2012 as we roll out our latest product innovations globally. Our ageLOC super-class o...