"Depending on whether religious switching continues at recent rates, speeds up or stops entirely, the projections show Christians of all ages shrinking from 64% to between a little more than half (54%) and just above one-third (35%) of all Americans by 2070," the pollster said.
Americans unaffiliated with a religion could rise from 30% to up to 54 percent by 2070, the pollster said.
The number of religious non-Christians, including Jews, Muslims, Hindus, and Buddhists, could rise from six percent to 13 percent in the same period, according to the survey.