Table 3. Average percentage of successful passage by Serie A teams, season by season, from 2013 to 2021.
Δ% = percentage increase.
| Serie A | 2013-2014 | 2014-2015 | 2015-2016 | 2016-2017 | 2017-2018 | 2018-2019 | 2019-2020 | 2020-2021 |
| Average % passes successful | 80.5 | 79.7 | 78.7 | 80 | 80.3 | 81.1 | 82.2 | 82.4 |
| Standard deviation | 3.4 | 3.6 | 4.8 | 4.3 | 4.4 | 3.9 | 3.4 | 3.4 |
| Mean standard error | 0.8 | 0.8 | 1.1 | 1 | 1 | 0.9 | 0.8 | 0.8 |
| t-test 2020 vs all | 1.6 | 2.3 | 2.7 | 1.9 | 1.5 | 1 | 0 | −0.1 |
| Δ% 2020 vs all | 2.1 | 3.2 | 4.5 | 2.8 | 2.4 | 1.4 | 0 | −0.2 |
| t-test 2021 vs all | 1.7 | 2.4 | 2.8 | 2 | 1.6 | 1.1 | 0.1 | 0 |
| Δ% 2021 vs all | 2.3 | 3.3 | 4.7 | 3 | 2.5 | 1.6 | 0.2 | 0 |