Worldwide, the average growth rate today is 1.14%. However, smaller countries have growth rates as high as 5%.
Correct. That and many other reasons is why the growth rate back in the days of Noah was probably on the upper end of 5% and not lower, as it is today. So, plenty of time to build a healthy population in numbers.
Care to document your assertion?
I recommend you read the Book of Genesis, Chapter 5, before standing on your 5% growth rate.