I think your numbers are probably correct. I don't happen to know another number: how many people in Chechnya would rather be independent than part of Russia. But it doesn't matter; the Russian government is very selective about how it applies the "right to self-determination".
The Russian government is likewise selective in its interpretation of the Budapest agreement (1994) [1], in which Russia guaranteed Ukraine's territorial integrity in return for Ukraine giving up nuclear weapons.
Edit: I incorrectly wrote "Bucharest agreement"; fixed it (thanks jotm)
The Russian government is likewise selective in its interpretation of the Budapest agreement (1994) [1], in which Russia guaranteed Ukraine's territorial integrity in return for Ukraine giving up nuclear weapons.
Edit: I incorrectly wrote "Bucharest agreement"; fixed it (thanks jotm)
[1] https://en.wikipedia.org/wiki/Budapest_Memorandum_on_Securit...