I'm not fully understanding your question could you please reword and retype it.
The answer is more-developed countries. Countries that are
considered to be more developed than most countries such as Japan, has a human
population with a large percent of post-reproductive individuals.
Post-reproductive individuals refers to the occurrence after the time in life
wherein an individual is capable of asexual reproduction. It is commonly found
in more-developed countries and may most likely decrease in size as time
passes.
In the post test only design
