Down Syndrome in the US (IMAGE) Massachusetts General Hospital Caption Estimated numbers of people with Down syndrome in the US, 1950-2010. Credit G. de Graaf, F. Buckley, and B. Skotko Usage Restrictions Usage restricted to coverage of this study. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.