Ontario, where they emerged through divisions from the main body of Mennonites in the late 19th century and from the division between automobile and horse-and-buggy groups in the early 20th century. In Indiana, Ohio and Virginia they also emerged through divisions, but in much smaller numbers. Settlements of horse-and-buggy Mennonites in other states were created by migrations, that started mainly since the 1960s. There are also Old Order Mennonites in Belize (Cayo and Toledo Districts). The table on the right lists the total population of horse-and-buggy Mennonites per U.S. state, Canadian province or Belize in North America in the late 1990s and the 2015 number of Pennsylvania German speaking Mennonites that is almost identical with the number of horse-and-buggy Mennonites. Adherents According to C. Henry Smith, who wrote in 1908, all Old Order Mennonite groups counted "hardly more than two thousand members". In 1957 the total number of members of all Old Order Mennonite groups was 5,800 members in 44 congregations. For the year 2001 Kraybill and Hostetter give the number 16,478 for the membership of "all Old Order Mennonites groups" in the USA. According to the Global Anabaptist Mennonite Encyclopedia in 2002 there were approximately 17,000 baptized Old Order Mennonite members in the USA and 3,000 in Canada. There were more than 27,000 adult, baptized members of Old Order Mennonites in North America and Belize in 2008/9. The total population of Old Order Mennonites groups speaking Pennsylvania German was about 43,000 in 2015, which indicates that the total population of all Old Order Mennonites groups, including those who have lost the language or are in the process of losing it, was roughly between 60,000 and 70,000 in 2015. Under the condition that the annual growth is 3.7 percent, this would result in a total Old Order Mennonite population of about 72,000 to 84,000 in 2021. Growth The Wenger Mennonites, the largest horse-and-buggy group, have a growth rate of 3.7 percent a year, which is comparable to the growth rate of Old Order Amish. The Wengers have larger families and a higher retention rate than their car-driving brothers, the Horning Mennonites. In 2005, the average number of children per household was 8.25 among Old Order Mennonites in Indiana. In a sample of 199 people from the Martindale District of the Wenger Mennonites, born between 1953 and 1968, there was a retention rate of 95 percent in 1998. Similar groups There