HOW RARE ARE TWINS?

HOW RARE ARE TWINS? As an identical twin, I should have an idea of frequently one encounters twins, but I didn’t. My first reaction on looking at twins who are successful in sports was surprise at how few there were. This wikipedia article puts things in perspective. About 2% of the people in the world are twins or triplets with the current rate of twin births in the United States being about 3%. However, less than 10% of twins are identical so that you could expect one pair of identical twins in about every 1000 people. So twins are not conspicuously unsuccessful in sports.