| # | Name | Parties | Matches |
|---|---|---|---|
| Manifesto Project | 26 | 26 | |
| ParlGov | 42 | 42 | |
| Wikipedia | 46 | 46 | |
| CHES | 20 | 20 | |
| CLEA | 21 | 21 | |
| EJPR PDY | 29 | 29 | |
| CHISOLS | 6 | 6 | |
| DPI | 21 | 21 | |
| Huber / Inglehart (1995) | 7 | 7 | |
| Kitschelt (2013) | 7 | 7 | |
| PolCon | 13 | 13 | |
| PPMD (2006) | 8 | 8 | |
| World Values Survey | 4 | 4 | |
| CSES | 6 | 6 | |
| EPAC (2018) | 10 | 10 | |
| ERDDA (2013) | 22 | 22 | |
| euandi (GPS) | 7 | 7 | |
| Global Elections DB | 21 | 21 | |
| KUREP (2012) | 10 | 10 | |
| MAPP | 15 | 15 | |
| PIP | 19 | 19 | |
| POPPA | 8 | 8 | |
| The PopuList | 11 | 11 | |
| EES 2014 | 8 | 8 |