| # | Name | Parties | Matches |
|---|---|---|---|
| Manifesto Project | 27 | 27 | |
| ParlGov | 46 | 46 | |
| Wikipedia | 54 | 54 | |
| CHES | 19 | 19 | |
| CLEA | 24 | 24 | |
| EJPR PDY | 23 | 23 | |
| CHISOLS | 9 | 9 | |
| DPI | 15 | 15 | |
| ESS | 29 | 29 | |
| Huber / Inglehart (1995) | 9 | 9 | |
| Kitschelt (2013) | 7 | 7 | |
| PolCon | 20 | 20 | |
| PPMD (2006) | 13 | 13 | |
| World Values Survey | 11 | 11 | |
| CSES | 15 | 15 | |
| EPAC (2018) | 10 | 10 | |
| ERDDA (2013) | 14 | 14 | |
| euandi (GPS) | 8 | 8 | |
| Global Elections DB | 17 | 17 | |
| Janda (1980) | 2 | 2 | |
| Jennings / Wlezien | 5 | 5 | |
| KUREP (2012) | 8 | 8 | |
| Mudde (2007) | 5 | 5 | |
| PIP | 19 | 19 | |
| POPPA | 10 | 10 | |
| The PopuList | 9 | 9 | |
| EES 2014 | 6 | 6 |