Tornado and related weather events were particularly costly in 2006, resulting in more than $8 billion in insured losses–the worst year on record, according to A.M. Best.

Tornadoes and related weather events have caused approximately 56 percent of all insured catastrophe losses in the United States in any given year, while hurricanes and earthquakes, on average, tend to generate higher losses per event, according to a special report by A.M. Best Co.

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