0,1,2,5,8,11,69,96 are Strobogrammatic numbers.
We call a Strobogrammatic numbers if:
When it is typed on a calculator, and the calculator is spun 180 degrees, the number visually looks the same.
How many Strobogrammatic numbers are there from 0 to 99999?
This is a no-computer puzzle; only the first right answer with explanation will be accepted.