How many people get killed by elephants every year?

According to Time (in partnership with CNN) : Zoologists today estimate elephants around the world kill 500 people a year. Where the great white shark kills only 4 people worldwide a year.

The Discovery Channel aired an episode of "I survived" involving elephant attacks in one park in China where the estimate for that one park was - 140 people killed on average a year. I would choose the Time/CNN research for the total amount.