Surely you are not so dense as to not understand that most christians are already dead, and most of those that are alive will be dead before Christ returns? Those that live to see the Tribulation will have a very small chance of living through it.
aaawwwww. poor 4runner needs schoolin'.....
let's start with the easy part.
go to 30AD and start counting estimated christians, per year if you like, right up to today.
can you do that?
how many are alive today? (you'll say something like .0000001% since most aren't truly christians, but you'll be in that teeny number)....maybe i'm a prophet!
if you can do that part, we'll move on to the harder stuff.
take your time.