Eight percent of one sample (n = 112) of Lancaster county Amish have sought medical care in Mexico.
That is from Donald B. Kraybill, Karen M. Johnson-Weiner, and Steven M. Nolt, The Amish, which is an excellent social scientific look at what we outsiders know about Amish communities.
I also learned that the Amish strongly frown on home schooling of children and consider it possible grounds for excommunication. The requirement to use the internet has pushed many Amish out of public school systems, and the Amish are experts at making apprenticeship systems work. Inequality of wealth seems to be rising among the Amish.