Buddhism in Central Asia^[https://en.wikipedia.org/wiki/Buddhism_in_Central_Asia] refers to the forms of Buddhism (mainly Mahayana) that existed in Central Asia, which were historically especially prevalent along the Silk Road. The history of Buddhism in Central Asia is closely related to the Silk Road transmission of Buddhism during the first millennium of the common era.
Turkmenistan 5,097,028 0.1% [link below] 5,097
0.1%^[There are dozens of us, dozens!] : https://web.archive.org/web/20190608183152/https://2001-2009.state.gov/g/drl/rls/irf/2006/72290.htm