| Anno di imposta | Imposta netta | Ritenute totali | ||
|---|---|---|---|---|
| Frequenza | Ammontare | Frequenza | Ammontare | |
| 2022 | 32.373.363 | 174.201.435 | 33.057.725 | 169.334.800 |
| 2021 | 31.365.535 | 170.993.284 | 32.212.965 | 168.146.713 |
| 2020 | 30.327.388 | 159.281.005 | 31.595.679 | 158.528.052 |
| 2019 | 31.160.957 | 165.116.802 | 31.676.912 | 161.673.144 |
| 2018 | 31.155.444 | 164.244.267 | 31.535.267 | 158.231.458 |
| 2017 | 30.672.866 | 157.516.039 | 31.252.458 | 152.657.167 |
| 2016 | 30.781.688 | 156.047.262 | 30.924.258 | 149.379.902 |
| 2015 | 30.878.816 | 155.157.955 | 30.948.820 | 147.792.314 |
| 2014 | 30.728.956 | 151.185.237 | 30.651.238 | 143.062.301 |
| 2013 | 31.019.713 | 152.238.194 | 30.806.277 | 143.265.513 |
| 2012 | 31.216.838 | 152.270.261 | 30.857.446 | 142.223.511 |
| 2011 | 31.590.066 | 152.219.369 | 30.586.267 | 139.097.035 |
| 2010 | 30.897.194 | 149.442.986 | 30.641.017 | 136.167.847 |
| 2009 | 31.008.328 | 146.493.242 | 30.567.613 | 132.789.490 |
| 2008 | 31.087.681 | 146.157.039 | 30.488.087 | 130.109.910 |
| 2007 | 30.503.420 | 142.450.080 | 29.663.251 | 123.733.335 |
