Things I want to know after playing around with other countries' data:
- Why did twin births peak in the mid-2010s in so many places?
- Why has Japan had so few twins historically?
- What's up with the Chilean Twin Spike of 1983?
- Why did twin births peak in the mid-2010s in so many places?
- Why has Japan had so few twins historically?
- What's up with the Chilean Twin Spike of 1983?
Comments
Or a measurement/record keeping/statistical blip?