I have lived 5,306 days.
I've outlived Mattie Stepanek by 217 days.
If I can make it 547 more days, I will outlive Michael Cuccione.
But... chances are pretty good that you're still working on the 5,306th day.
And recalling what it feels like... nothing but great things and no end in sight!
Each of the youthful tragedies referenced (and the others not mentioned) is a sobering event... an irreplaceable loss to humanity. :(
EDIT: Impression level reduced a tad (after checking link)... no math involved (unless you checked the result).