A recent study has revealed that the American Amish population has increased by 86% since 1992, with population numbers now around 231,000. The incredible rate of growth within the community has occurred due to the Amish insistence that members always marry within their group and an average family size of 5 to 6 children. Although it would seem odd that insular marriages would actually help a community grow, it has kept the Amish group's values strict and uninfluenced by us pesky members of the 21st-century. The study also said that longer life spans thanks to better health care contributed to the increased population. [Reuters]