2009: 3669 penalties

2010: 3713 penalties

2011: 3896 penalties

2012: 3809 penalties

2013: 3635 penalties

2014: 4246 penalties

2015: 4326 penalties

2016: 4164 penalties

2017: 4166 penalties

2018: 4205 penalties

2019: 4278 penalties

2020: 3499 penalties (covid year)

2021: 3909 penalties (added a 17th game)

2022: 3726 penalties

2023: 2229 penalties on pace for 4012 (this on pace will vary a bit due to bye weeks for various teams)

Saw a sizable spike 2014-2019, but actually went down on averages the last few years while adding an extra week.