Multiple things are happening, it would be hard to disentangle them in absence of more detailed data.
Some people genuinely prefer Russia’s rule.
Some people think it’s the same, so they favor status quo to yet another fight.
Some people think it’s slightly worse, but still not worth yet another fight.
Some people who didn’t like Russia’s rule were killed or left Crimea.
Some new people arrived from Russia.
Some people are okay with Russia’s rule based on what they learn from Russian TV, but they would not be okay if they also had access to non-Russian TV.
Some people do not trust the anonymity of the poll, and believe (correctly or not) that they would be punished if they voted against Russia.
All of these contribute to the poll in the same direction, but from outside some of them could be interpreted as “Russia good” and some could be interpreted as “Russia bad”. The poll alone does not tell us the proportion of that.
Multiple things are happening, it would be hard to disentangle them in absence of more detailed data.
Some people genuinely prefer Russia’s rule.
Some people think it’s the same, so they favor status quo to yet another fight.
Some people think it’s slightly worse, but still not worth yet another fight.
Some people who didn’t like Russia’s rule were killed or left Crimea.
Some new people arrived from Russia.
Some people are okay with Russia’s rule based on what they learn from Russian TV, but they would not be okay if they also had access to non-Russian TV.
Some people do not trust the anonymity of the poll, and believe (correctly or not) that they would be punished if they voted against Russia.
All of these contribute to the poll in the same direction, but from outside some of them could be interpreted as “Russia good” and some could be interpreted as “Russia bad”. The poll alone does not tell us the proportion of that.