In a post at the New Liturgical Movement blog,
Claudio Salvucci writes:
It may surprise Anglicans–it certainly surprised me–at how numerically negligible some of the existing ethnic enclaves within Holy Mother Church really are.
The Annuario of Eastern Churches states that as of 2010, the Albanian Byzantine Catholic Church had 3845 members, 9 parishes, and 1 bishop. The Greek Byzantine Catholic Church had 2525 members, 4 parishes, and 1 bishop. The Bulgarian Catholic Church, 10,000 members, 21 parishes, 1 bishop. These are sui juris churches; there are also other Eastern communities without a hierarchy that are even smaller. Georgian Byzantine-Rite Catholics number perhaps only 500.
In the Western Church, only a handful of churches in Spain regularly offer the venerable Mozarabic Rite. There are about 6 parishes and as many priests in the Hebrew-speaking Catholic vicariate–headed by a patriarchal vicar, not a dedicated bishop. There are three American Indian missions along the St. Lawrence that preserve a 300-year old tradition of Iroquois plainchant and hymnody that dates from the North American martyrs. They have no dedicated priests or religious, no dedicated bishop, no formal recognition above the parish level. In the 1930s they were justly proud to have a native Mohawk priest–but that was about the extent of it.
Being faithful in small things extends from the individual all the way to the entire Church.