(CNN) - The number of shark attacks last year dropped to a four-year low but they were deadlier, according to a University of Florida report.
Worldwide, there were 72 shark attacks last year.
The last time shark attacks were that low was in 2009 when there were 67.
But 10 people were killed in shark attacks in 2013, about four more than the average number of deaths over the past 10 years.
In the United States, the number of shark attacks dropped to 47 last year - nearly half of them in Florida.
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