About 80% of Ukraine's general population speaks Russia 29 4, 7:34pm

This says 70% are "fluent" in Russian:

https://translate.google.com/translate?hl=is&sl=ru&tl=en&u=http%3A%2F%2Fdemoscope.ru%2Fweekly%2F2008%2F0329%2Ftema03.php

I can't read the graph at the top which goes into more detail.. my Cyrillic is only good enough to make out that Ukraine is #2 on the chart. If someone can read the other options, that would be great ;)