60 to 70 million people are affected by digestive diseases in the United States, that is, twenty percent of the population. This means about 7 million skiers are affected. However, that statistic is a measure of the number of people who seek medical help. It does not include the countless millions and millions who burp and pass gas from gastrointestinal distress on a daily basis. National Institutes of Health, U.S. Department of Health and Human Services.
Good article.