| Year | # | Maximum IF | Minimum IF | Average IF |
| 2024 | 111 | 16.4 | 1.927 | 5.166 |
| 2023 | 97 | 18.027 | 0.413 | 5.087 |
| 2022 | 102 | 15.19 | 1.02 | 4.942 |
| 2021 | 141 | 14.908 | 0.243 | 4.768 |
| 2020 | 134 | 18.027 | 0.243 | 4.703 |
| 2019 | 119 | 14.224 | 0.562 | 4.552 |
| 2018 | 122 | 72.087 | 0.396 | 5.759 |
| 2017 | 159 | 13.7 | 0.32 | 4.534 |
| 2016 | 170 | 12.822 | 0.562 | 4.342 |
| 2015 | 191 | 12.91 | 0.555 | 4.341 |
| 2014 | 195 | 17.694 | 0.403 | 4.057 |
| 2013 | 184 | 17.681 | 0.413 | 4.45 |
| 2012 | 163 | 17.681 | 0.413 | 4.193 |
| 2011 | 177 | 15.304 | 0.324 | 4.395 |
| 2010 | 137 | 15.304 | 0.562 | 4.291 |
| 2009 | 97 | 16.799 | 0.562 | 4.89 |
| 2008 | 134 | 16.823 | 0.314 | 4.113 |
| 2007 | 131 | 16.383 | 0.21 | 4.511 |
| 2006 | 122 | 15.111 | 0.648 | 4.331 |
| 2005 | 136 | 13.081 | 0.206 | 3.866 |
| 2004 | 127 | 72.087 | 0.664 | 4.865 |
| 2003 | 74 | 41.307 | 0.593 | 4.936 |
| 2002 | 64 | 17.681 | 0.417 | 4.59 |
| 2001 | 38 | 72.087 | 0.215 | 6.49 |
| 2000 | 32 | 8.972 | 0.926 | 3.495 |
| 1999 | 20 | 6.51 | 0.215 | 3.053 |
| 1998 | 10 | 6.51 | 1.715 | 3.818 |
| 1997 | 5 | 3.571 | 1.918 | 2.5 |
| 1996 | 2 | 11.467 | 11.467 | 11.467 |