| Partito | Pd | Leghe | Fratelli d'Italia | Forza Italia | Rifondazione Comunista | Si-Sel | Fed. dei verdi | Svp |
|---|---|---|---|---|---|---|---|---|
| 2015 | 5358250 | 1109082 | 472384 | 529904 | 342732 | 881588 | 149659 | |
| 2016 | 6401481 | 1411007 | 569865 | 615761 | 459970 | 838155 | 167865 | 234510 |
| 2017 | 7999885 | 1894085 | 789937 | 850392 | 611337 | 753985 | 271125 | 477572 |
| 2018 | 7002826 | 2962568 | 720437 | 637130 | 547426 | 316960 | 257919 | 287329 |
| 2019 | 8437932 | 3844176 | 1168061 | 623076 | 535889 | 499257 | 695697 | 313429 |
| 2020 | 7428817 | 3004928 | 2196866 | 575438 | 571310 | 438166 | 616932 | 334426 |