| # | Years | Size | Links | |
|---|---|---|---|---|
| ADPSDCDS | 1980–1983 | 45.5% | ||
| APU | 1980–1987 | 18.8% | ||
| BE | 2003–2015 | 10.1% | ||
| CDS | 1977–1985 | 16.7% | ||
| CDSPP | 1992–2015 | 12.2% | ||
| CDU | 1988–2009 | 12.1% | ||
| FRS | 1981–1983 | 26.6% | ||
| PCP | 1977–1979 | 15.3% | ||
| PCPPEV | 2012–2015 | 8.2% | ||
| PP | 1996–2005 | 9.1% | ||
| PPD | 1977–1979 | 25.2% | ||
| PRD | 1986–1991 | 17.9% | ||
| PS | 1996–2015 | 46.4% | ||
| PSD | 1980–2015 | 50.6% | ||
| PSP | 1977–1995 | 45.5% | ||
| UDP | 1981–1985 | 6.1% |