Nu Skin Enterprises made $42 million less in 2006 than the previous year, about half of that due to restructuring costs. The Provo-based company, which specializes in supplements and skin care products, reported earnings of 47 cents per diluted share compared to $1.04 last year. Excluding restructuring, year-end earnings would have been 75 cents per diluted share, officials said. Fourth-quarter earnings rose slightly to $15.9 million and 23 cents per share - up from $15.8 million and 22 cents per share - from the same quarter last year. Revenues dipped $1.5 million or 1 percent from the same period last year. Sales were down in North Asia, Greater China and, while South Asia saw an 8 percent improvement over the fourth quarter of 2005. During the quarter, the company paid down $11.6 million of debt, paid $6.8 million in dividends and used $37.9 million to repurchase 2.1 million shares of...