English Name
Time
Details from Source
perc
Manifesto Project
WUA
ESS prtc*
Mackie / Rose (1991)
UnPa
Mudde (2007)
ICP
Poll of Polls
RigtChange
added: June 9, 2020, 12:30 a.m. — updated: May 13, 2023, 4:21 p.m.