| Regione | Ritenute | ||
|---|---|---|---|
| Frequenza | Ammontare | Mediana | |
| Piemonte | 5.869 | 192.663 | 25,80 |
| Valle d'Aosta | 183 | 5.837 | 24,91 |
| Lombardia | 18.098 | 727.171 | 28,34 |
| Liguria | 2.184 | 73.561 | 25,55 |
| Trentino Alto Adige (P.A. Trento) | 768 | 24.268 | 25,76 |
| Trentino Alto Adige (P.A. Bolzano) | 996 | 37.703 | 31,22 |
| Veneto | 7.375 | 269.922 | 28,48 |
| Friuli Venezia Giulia | 1.459 | 49.554 | 26,10 |
| Emilia Romagna | 7.468 | 260.172 | 26,93 |
| Toscana | 4.939 | 164.225 | 26,18 |
| Umbria | 849 | 28.180 | 26,01 |
| Marche | 1.795 | 57.913 | 26,05 |
| Lazio | 8.694 | 354.339 | 26,89 |
| Abruzzo | 1.253 | 40.449 | 26,66 |
| Molise | 224 | 6.432 | 24,78 |
| Campania | 4.321 | 150.427 | 25,95 |
| Puglia | 3.303 | 104.060 | 26,59 |
| Basilicata | 358 | 10.969 | 26,01 |
| Calabria | 905 | 28.098 | 25,67 |
| Sicilia | 3.189 | 97.221 | 25,09 |
| Sardegna | 1.265 | 38.709 | 24,76 |
| TOTALE | 75.495 | 2.721.872 | 26,83 |
