| Rank | Season | 1st Downs Allowed/Game | % of 1st Downs Allowed on 1st Down | % of 1st Downs Allowed on 2nd Down | % of 1st Downs Allowed on 3rd Down | % of 1st Downs Allowed on 4th Down |
|---|
| 1 | 2023 | 17.5 | 37.3 | 36.8 | 23.7 | 2.2 |
| 2 | 2022 | 21.4 | 34.2 | 36.0 | 27.0 | 2.9 |
| 3 | 2021 | 18.9 | 40.1 | 32.6 | 23.8 | 3.5 |
| 4 | 2020 | 15.2 | 34.5 | 31.0 | 25.9 | 8.6 |
| 5 | 2019 | 15.8 | 33.2 | 35.6 | 24.4 | 6.8 |
| 6 | 2018 | 16.5 | 31.6 | 32.1 | 28.4 | 7.9 |
| 7 | 2017 | 16.3 | 33.7 | 36.2 | 27.0 | 3.1 |
| 8 | 2016 | 17.7 | 43.9 | 32.1 | 18.9 | 5.2 |
| 9 | 2015 | 14.7 | 36.6 | 35.1 | 25.7 | 2.6 |
| 10 | 2014 | 18.5 | 23.0 | 45.9 | 27.5 | 3.6 |
| 11 | 2013 | 15.5 | 29.2 | 35.1 | 31.0 | 4.7 |
| 12 | 2012 | 14.8 | 25.6 | 39.1 | 30.9 | 4.3 |
| 13 | 2011 | 16.4 | 31.4 | 34.9 | 28.8 | 4.8 |
| 14 | 2010 | 12.9 | 30.6 | 33.2 | 33.2 | 3.1 |
| 15 | 2009 | 15.5 | 31.2 | 31.8 | 31.8 | 5.3 |
| 16 | 2008 | 18.6 | 29.8 | 40.0 | 24.9 | 5.4 |
| 17 | 2007 | 18.7 | 31.1 | 35.0 | 27.7 | 6.3 |
| 18 | 2006 | 13.5 | 27.0 | 35.8 | 33.1 | 4.1 |
| 19 | 2005 | 17.1 | 34.6 | 33.2 | 29.8 | 2.4 |
| 20 | 2004 | 14.0 | 35.7 | 38.7 | 22.6 | 3.0 |
| 21 | 2003 | 15.1 | 30.1 | 34.3 | 30.1 | 5.4 |
| 22 | 2002 | 13.1 | 26.2 | 36.6 | 29.5 | 7.7 |
| 23 | 2000 | 16.6 | 27.7 | 42.2 | 27.7 | 2.4 |
| 24 | 1999 | 15.1 | 30.5 | 35.4 | 28.8 | 5.3 |
| 25 | 1998 | 17.1 | 33.2 | 32.4 | 28.9 | 5.5 |