English Name
Time
Details from Source
perc
Manifesto Project
PZZ
ESS prtc*
ESS prtv*
Mudde (2007)
RSA
KPNO
PIP
PoWeUn
Poll of Polls
PZ
UED
The PopuList
PHW 1929
UkLaanPePa
added: Aug. 15, 2019, 4:48 p.m. — updated: March 12, 2021, 11:16 a.m.