At its peak, 88% of Lithuania's electricity was generated by the Ignalina nuclear power plant, more than twenty years ago
72% confidence
EnvironmentLithuania
Omissions
The 88% peak corresponds specifically to 1993 (more than thirty years before the session, not merely 'more than twenty'), when both RBMK-1500 units were operating; the share fell to about 70% by the plant's closure in 2009.
No primary source (IAEA, Eurostat, Lithuanian statistics office) stating the exact 88% figure was located within the search budget; the figure is corroborated only by secondary sources.