English Name
Time
Details from Source
perc
Manifesto Project
WUA
ESS prtc*
Mackie / Rose (1991)
UnPa
Mudde (2007)
ICP
Poll of Polls
RigtChange
POPPA
RTOC
added: June 9, 2020, 12:30 a.m. — updated: March 28, 2025, 1:53 p.m.