Nice to seem somebody give this a proper statistical analysis.
TLDR: 2016 was more deadly for celebrities, but only slightly (25-45% more deaths than should be expected), making 2016 a one in 25 or 100 years rarity, depending on how you count. https://medium.com/@jasoncrease/was-2016-especially-dangerous-for-celebrities-79d79b9fae02#.4gsgny9ws