^a Based upon a median salary of $24,722 per year. Payscale.com, job listing for certified nursing assistant position at Mary Immaculate Nursing/Restorative Center in Lawrence, MA, part of Covenant Health.

^b Catholic Health Association of the United States of America, “Catholic Health Care in the United States,” January 2013.

^c Dale McDonald and Margaret M. Schultz on behalf of the National Catholic Education Association, “United States Catholic Elementary and Secondary Schools 2011-2012,” 2012.

^d 13.9%, or 23,436 of faculty at Catholic elementary and secondary schools. McDonald and Schultz, 2012.

^e 74.9% of all full-time professional teaching staff. McDonald and Schultz, 2012.

^f Centers for Disease Control and Prevention, National Survey of Family Growth, 2006–2010.