Complex sentence: The 2001 Canadian census reported that 77% of Canadians claim adherence to Christianity, followed by no religion at 16%, but rates of religious adherence have been steadily decreasing.
Split into simpler sentences: The 2001 Canadian census reported that 77% of Canadians claim adherence to Christianity, followed by no religion at 16%. Though the Canadian population is largely Christian, rates of religious adherence have been steadily decreasing.