Although there are inconsistent exact numbers of conversions, many scholars and chaplains cite Islam as the fastest growing religion among the incarcerated population. It is estimated that 15% of the U.S. prison population is Muslim, mostly composed of African Americans but followed by Latinos. In 1991 an estimated 35,000 people in prison converted to Islam every year, and more recent estimates range from 30,000–40,000 per year. With the growth of the imprisoned population with mass incarceration and the growth of Islam in the U.S., these numbers are bound to be under-representing the Muslim convert population in prison.