I do not have facts, but the numbers of people in China would give them an edge. I do know china have restrictions on the second child, and twins allow for no fines for the second. so implanting tow eggs for some could save money and allow for two children.
If you are asking numbers per 1000 or a fixed number, I have no idea.
India
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.
The concordance rate for autism in identical twins is estimated to be around 70-90%, while in fraternal twins it is around 0-30%. This suggests a strong genetic component in the development of autism.
Yoruba
Benin, a country in West Africa, has the highest twinning rate in the world with about 27.9 twins per 1,000 births. This is attributed to genetic factors and a diet rich in yams.
Identical twins occur when a single fertilized egg splits into two embryos, resulting in genetically identical individuals. The occurrence rate of identical twins is approximately 3 to 4 per 1,000 births, making them relatively rare compared to fraternal twins. Factors such as genetics and maternal age can influence the likelihood of having identical twins, but the process itself is largely random.
The country with the highest female circumcision rate is Egypt.
50%
It has the highest rate of twins births in the world.
I believe Georgia has the highest literacy rate and Cuba has the second highest. :D
Iceland has a crime rate of 14, 726.95 reported criminals every 100,000 citizens which is the highest reported to this day
the country with the highest total fertility rate is Nigeria, Africa.