Consider the subjectivity of a "perceptions" index. And also, based on my own direct experience of corruption while doing business in a few countries, Transparency International's rankings bore no relationship to what I was seeing. Societies whose elites are skilled at concealing corruption tend to have lower perception rankings than those where the elites are more flagrant, even when the actual corruption is the same in both cases. Not to mention that those doing the reporting are people doing business in those countries, and such people rapidly adapt to the local conditions.

I understand that hard data isn't easy to come by, but using a perceptions index as a proxy is methodologically very questionable.

According to this list Ukraine is the 104th country by corruption (104th least corrupt worldwide), out of 182 countries/territories ranked.

Unless I missed something, it also appears to be taking the spot of the top 5 most corrupt country in Europe (not counting Russia, 6th if you do count it), behind only: Bosnia and Herzegovina, Serbia, Belarus, and Syria.