"in 2013": It might be an outlier. We had an abnormally large group of terrorism-related deaths in 2001, but on average it's less, and the same type of thing m

"in 2013": It might be an outlier. We had an abnormally large group of terrorism-related deaths in 2001, but on average it's less, and the same type of thing may be in effect here. That year may have been bad for deaths by police, and better for train safety, than average.