Birth rate
As of 2017, Niger has the highest birth rate in the world with 49.443 per thousand people. 
Japan has one of the lowest birth rates in the world with 8 per thousand people.
While in Japan there are 126 million people and in Niger 21 million, both countries had around 1 million babies born in 2016.
Crime in the United States
According to a 2001 report from UNICEF, the United States has the highest rate of deaths from child abuse and neglect of any industrialized nation, at 2.4 per 100,000 children; France has 1.4, Japan 1, UK 0.9 and Germany 0.8. According to the US Department of Health, the state of Texas has the highest death rate, at 4.05 per 100,000 children, New York has 2.46, Oregon 1.49 and New Hampshire 0.35.  A UNICEF report on child wellbeing stated that the United States and the United Kingdom ranked lowest among industrial nations with respect to the wellbeing of children.