shutdowns and lower margins caused its 2007 net profit to fall 17.3% to NZ$112.05 million. (US$1=NZ$1.26). Its revenue was down 16.2% to NZ$338.3 million.   NZ Refining said it will pay a dividend of NZ35 cents per share.  Operating the country’s only oil refinery at Marsden Point near Whangarei, the company is New Zealand’s leading…