Paced by Mortgage Guaranty Insurance Corp., the private MI industry wrote a record $283.0 billion in new primary mortgage insurance business during 2001, topping the previous year by some 73.4 percent. According to a new market analysis and ranking by Inside Mortgage Finance, total primary insurance hit $449.6 billion last year, including business by the private MIs, the FHA and the VA home loan guaranty program. That was up 61.4 percent from 2000’s $278.5 billion