Data are for the U.S.
- Number of twin births: 131,269
- Number of triplet births: 4,598
- Number of quadruplet births: 276
- Number of quintuplets and other higher order births: 45
- Twin birth rate: 33.1 per 1,000 live births
- Triplet or higher order birth rate: 124.4 per 100,000 live births