| # | Years | Size | Links | |
|---|---|---|---|---|
| AESI | 1987–1987 | 1.6% | ||
| ASD | 1983–1983 | 6.7% | ||
| BF | 2013–2016 | 9.5% | ||
| CentP | 2017–2017 | 11.1% | ||
| CM | 2009–2009 | 6.3% | ||
| CP | 1987–1987 | 11.1% | ||
| IP | 1944–2017 | 41.7% | ||
| LG | 1999–2017 | 22.2% | ||
| LP | 1999–2007 | 6.3% | ||
| NPP | 1953–1953 | 3.8% | ||
| Other minor MPs | 1979–1979 | 1.7% | ||
| P | 2013–2017 | 15.9% | ||
| PA | 1956–1995 | 23.3% | ||
| PeP | 2017–2017 | 6.3% | ||
| PP | 1944–2017 | 36.5% | ||
| RP | 2016–2017 | 11.1% | ||
| SDA | 1999–2017 | 31.7% | ||
| SDP | 1944–1995 | 23.3% | ||
| SP | 1944–1953 | 19.2% | ||
| THPM | 1995–1995 | 6.3% | ||
| ULL | 1971–1974 | 8.3% | ||
| WA | 1983–1995 | 9.5% |