1) Find and list U.S. working age population for all the years listed on that table starting from 2005.
2) How many more available workers were there at the latest year on the table compared to 2005?
3) Do the same for Japan (list data for Japan; how many more available workers they had?).
4) Which one had the greatest increase in the number of available workers and thus, the possibility of the greatest outward shift in their nation's production possibilities curve?