| # | Years | Size | Links | |
|---|---|---|---|---|
| AD | 1994–1994 | 2.9% | ||
| AN | 1994–2006 | 17.3% | ||
| CCDCDUUDC | 1994–2013 | 6.5% | ||
| CD | 2008–2018 | 2.1% | ||
| CeR | 2013–2013 | 1.7% | ||
| DC | 1946–1992 | 53.1% | ||
| DeL | 2001–2001 | 13.4% | ||
| Dem | 1996–1996 | 3.2% | ||
| Ex Left | 1976–2006 | 6.5% | ||
| FdI | 2013–2018 | 5.1% | ||
| FeL | 1994–1994 | 4.0% | ||
| FIPdL | 1994–2018 | 43.7% | ||
| FLI | 2008–2008 | 5.7% | ||
| LeU | 2018–2018 | 2.2% | ||
| LN | 1992–2018 | 19.7% | ||
| MS | 2013–2018 | 35.3% | ||
| MAIE | 2008–2018 | 2.5% | ||
| Mon | 1948–1968 | 6.8% | ||
| MpA | 2006–2008 | 1.3% | ||
| MSI | 1946–1992 | 8.9% | ||
| NCD | 2013–2018 | 4.6% | ||
| NS | 2008–2008 | 1.7% | ||
| PCIPDSDS | 1946–2001 | 36.2% | ||
| PD | 2006–2018 | 49.0% | ||
| PdCI | 1996–2006 | 3.3% | ||
| PLI | 1946–1992 | 10.3% | ||
| PpI | 2013–2013 | 1.9% | ||
| PPI | 1994–1996 | 10.6% | ||
| PR | 1976–2018 | 2.9% | ||
| PRI | 1946–1992 | 4.6% | ||
| PS | 1994–1996 | 1.4% | ||
| PSDI | 1948–1992 | 5.7% | ||
| PTCN | 2008–2008 | 4.6% | ||
| Rete | 1992–1996 | 1.9% | ||
| RI | 1996–1996 | 4.1% | ||
| RnP | 2006–2006 | 2.9% | ||
| SC | 2013–2013 | 6.2% | ||
| SD | 2006–2006 | 3.3% | ||
| SDI | 1996–2001 | 1.5% | ||
| SELSI | 2013–2013 | 6.5% | ||
| UDRUDEUR | 1996–2006 | 4.3% |