No you can't. You absolutely can't, and every Russian knows that there is no such thing as an anonymous poll. Those 20% are the miracle and statistical wonder.
It is so ingrained in the Russian psyche, even in 2012 when the situation was way more clear and safe, 9 in 10 people straight up refused to talk with pollers about politics, and half of those who didn't responded only in yeses and were quite uncomfortable with the situation.
If you spend a second reading what the remaining social institutions in Russia are saying, you will be both horrified, and disillusioned with all those polls floating around. It's a nightmarish vacuum out there, they have zero fucking idea hoe many people are there, the estimations are "give or take 50 millions", the idea that there is a poll that can say anything definitive is laughable