Manpower....

I wonder at the meaning of manpower. Is it the mere population count or the effective population? well....by effective population i mean that fraction which is skilled and contributes to the growth....of infrastructure or resources.
India having such a huge population and with a high fertility rate should have been the most prosperous country... but we know the truth.
It is heard that china is suffering from major labor crisis. i guess because of low fertitily rate one day there will be a HR crunch there.
so where is our country? behind or ahead?