UK abbreviations for counties — postal cities mostly don’t have nice
standard abbreviation, so some are first search result of “foo
abbreviation” and some are made up to be unique in the dataset and
reasonable :-)

replace pre-2006 Rwandese provinces with current set plus 2 digit
region codes from ISO3166-2

added new provinces from 2002-2010 using ISO3166-2 region code (3
digits) without country prefix

I can’t find any attestation for the 99 towns as an official region
list, so I’ve used the ISO3166-2 list with region codes and bilingual
names

Zambia has 1 new province
Zimbabwe had a typo