| Year | # | Maximum IF | Minimum IF | Average IF |
|---|---|---|---|---|
| 2024 | 28 | 16.4 | 2.292 | 5.458 |
| 2023 | 18 | 9.756 | 0.413 | 4.745 |
| 2022 | 15 | 6.888 | 2.346 | 4.09 |
| 2021 | 12 | 5.235 | 0.59 | 3.535 |
| 2020 | 10 | 8.025 | 2.873 | 5.129 |
| 2019 | 12 | 5.589 | 2.035 | 3.658 |
| 2018 | 11 | 8.025 | 1.714 | 4.332 |
| 2017 | 21 | 11.889 | 0.413 | 4.416 |
| 2016 | 27 | 12.822 | 1.099 | 4.352 |
| 2015 | 36 | 10.723 | 1.714 | 4.046 |
| 2014 | 39 | 8.307 | 0.413 | 3.833 |
| 2013 | 34 | 11.467 | 0.413 | 3.989 |
| 2012 | 22 | 7.05 | 0.413 | 3.714 |
| 2011 | 25 | 10.103 | 1.639 | 3.801 |
| 2010 | 16 | 7.05 | 0.944 | 3.421 |
| 2009 | 3 | 6.1 | 6.1 | 6.1 |
| 2008 | 17 | 10.334 | 1.515 | 3.654 |
| 2007 | 11 | 8.039 | 0.664 | 4.324 |
| 2006 | 6 | 6.162 | 2.94 | 4.955 |