of babies born in 2014 were twins, triplets or higher-order multiples

Source: Pew Research Center
Additional Information: In 2014, 3.5 percent of babies born were twins, triplets, or higher-order multiples, accounting for almost 140,000 births. While multiples still make up a small share of births, this marks a dramatic increase since 1915—the first year for which reliable data are available—when about 2 percent of all births were multiples.

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