The National Day of Prayer, established by Congress in 1952, occurs on May 7 this year. The U.S. Religious Landscape Survey, conducted by the Pew Research Center’s Forum on Religion & Public Life, shows that prayer is a common religious practice in America, with nearly six-in-ten adults in the U.S. saying they pray at least once a day. However, frequency of prayer differs significantly by religious tradition, age, gender and income.

Data from the Pew Forum U.S. Religious Landscape Survey, conducted May 8 to Aug. 13, 2007, among more than 35,000 Americans age 18 and older; released in 2008.

Question wording: People practice their religion in different ways. Outside of attending religious services, do you pray several times a day, once a day, a few times a week, once a week, a few times a month, seldom, or never?