Info on Countries

life expectancy - the probable number of years remaining in your life, referring to heredity, health, physical condition, and nutrition.
http://dictionary.reference.com/browse/life+expectancy 

crude birthrate - Crude birth rate is the nativity or childbirths per 1,000 people per year.
en.wikipedia.org/wiki/Crude_birth_rate 

RNI (rate of natural increase) - is the crude birth rate  minus the crude death rate of a population.
http://en.wikipedia.org/wiki/Rate_of_natural_increase

TFR (total fertility rate) -  is the average number of children that would be born to a woman over her lifetime.
http://en.wikipedia.org/wiki/Total_fertility_rate

net migration rate -  is the difference of immigrants and emigrants of an area in a period of time, divided (usually) per 1,000 inhabitants (considered on midterm population).
http://en.wikipedia.org/wiki/Net_migration_rate

population pyramid - also called an age structure diagram, is a graphical illustration that shows the distribution of various age groups in a human population, which normally forms the shape of a pyramid.
http://en.wikipedia.org/wiki/Population_pyramid

What the countries are ranked in the world:

life expectancy - Japan 82.12 years, ranked #3, France 77.79 years ranked #8, Kenya 57.86 years ranked #189, Cuba 77.45 years ranked #55, United States 78.11 years ranked #49, Afghanistan 44.4 years ranked #219

crude birthrate - Japan 7.64 births/1,000 ranked #222, Kenya 36.64 births/1,000 ranked #29, Ethiopia 43.66 births/1,000 ranked #7, United States13.83 births/1,000 ranked #154,Germany 8.18 births/1,000 population ranked #220

crude death rate - Afghanistan 17.83 deaths/1,000 population ranked #7, Kenya 9.72 deaths/1,000 ranked #67, United States 8.38 deaths/1,000 raked #99, Japan 9.54 deaths/1,000 ranked #69, Mexico 4.8 deaths/1,000 ranked #192

TFR (total fertility rate) - Niger 7.68 children born/woman ranked #1, Afghanistan 5.5 children born/woman  ranked #13, Japan 1.2 children born/woman ranked #218, United States 2.06 children born/woman ranked #126, Germany 1.42 children born/woman ranked #196
  
net migration rate - Mexico -3.61 migrant(s)/1,000 population ranked #153, United States 4.32 migrant(s)/1,000 population ranked #25, United Arab Emirates 22.98 migrant(s)/1,000 population ranked #1, Argentina 0 migrant(s)/1,000 population ranked #73, Saudi Arabia -7.6 migrant(s)/1,000 population ranked #171, Uganda-8.83 migrant(s)/1,000 population ranked #173

https://www.cia.gov/library/publications/the-world-factbook/geos/ae.html