Pages for mm (Myanmar / Burma) don't show a graph

Graph pages for country=mm don't contain a graph. For example,

• https://metrics.torproject.org/userstats-relay-country.html?country=mm (archive)
• https://metrics.torproject.org/userstats-bridge-country.html?country=mm (archive)

I happened to click on the mm page because I noticed that "Burma" appears twice in the country selector (maybe a result of #4809 (moved)?).

...
Bulgaria
Burkina Faso
Burma
Burundi
Cambodia
...
Morocco
Mozambique
Burma
Namibia
Nauru
...