Lanefan
Victoria Rules
In all D&D games in aggregate? No.No, because the information is not available. Nobody tracks all the deaths in D&D games.
In our own games here? Yes.
It's impossible to track what led up to the death - was it bad luck or bad planning or player-side stupid or DM-side malice etc. - but the actual cause of death can be tracked provided half-decent records are being kept.
And each death often has two parts to its cause - the source, and the thing that did the actual killing. For example: Trap - Poison, or Melee - Giant, or Breath Weapon - Dragon, etc.