well, if you add "registered voters" who isn't a living breathing person registered at the given district (i.e. so called "dead souls") than you can easily get beyond the 100%.

Honestly, even i (whose opinion about the old country can rarely be made worse than it is) am impressed with the scale of the fraud. Well, 10+ years living outside of the country ... When i was leaving, the kickbacks on government contracts were 20-30%. Recently i learned that kickbacks are normally 75%+ these days. Strangely these numbers looks similar to what i thought and what really is the scale of the fraud.

In this case it's an obvious fraud, but technically such an outcome is possible and legal: voters can take a special paper and vote at another spot, rather than their home one (say, if they are in another city). So, in theory 140% can be achieved.