From the article: >Reasons for Population Growth. The primary forces driving the growth are sizable nuclear families (five or more children on average) and an

From the article: >Reasons for Population Growth. The primary forces driving the growth are sizable nuclear families (five or more children on average) and an average retention rate (Amish children who join the church as young adults) of 85 percent or more. A few outsiders have joined the Amish, but the growth is almost entirely from within the Amish community.