Russia, though they did pull out of the war early in 1917, they suffered 37 million casualties in the dead and wounded.
america
Treblinka had the highest number of murders per day. But many had a death rate of over 99%.
the country with the highest total fertility rate is Nigeria, Africa.
The United States of America takes in more immigrants per year than any other country combined. Source below.
1929
Liberia
Honduras
Logging has the highest death rate.
Niger has the highest birth rate in Africa, with an average of over 7 children born per woman. This high birth rate can have significant implications for the country's population growth and development.
Niger has the highest natural increase rate in the world
Niger 7.45
The country with the highest twin birth rate in the world is Benin, located in West Africa. It is estimated that about 27.9 out of every 1,000 births in Benin are twins, making it the highest rate globally.
According to the CIA, Swaziland has the highest death rate. See their web page: https://www.cia.gov/library/publications/the-world-factbook/rankorder/2066rank.html
america
The country with the highest female circumcision rate is Egypt.
america
Australia has one of the highest life expectancies in the world.