„The largest, most comprehensive surveys on religious identification [in the United States of America] were done in sociologists Barry A. Kosmin, Seymour P. Lachman and associates at the Graduate School of the City University of New York. Their first major study was done in 1990: the National Survey of Religious Identification (NSRI).

This scientific nationwide survey of 113,000 Americans asked about religious preference, along with other questions. They followed this up, with even more sophisticated methodology and more questions, with the American Religious Identity Survey (ARIS) conducted in 2001, with a sample size of 50,000 Americans. The following table comes from the NSRI and ARIS data:”