The value of the punter in football boils down to the value of field position. If a team starts their drive at their own 20-yard line, their drive is inherently less valuable than a drive that starts at mid-field. The goal of the punter is to minimize the value of an opposing offense’s drives by attempting to minimize the quality of their starting field position. By determining an offense’s expected starting field position before a punt and comparing this to their actual starting field position after the punt, the value of the punter can be quantified.
For a more detailed explanation of this metric, read about it here.
On this page, you can see the full single-season punting data from 1999 to 2019.
APS: The average number of Expected Points a punter saved per punt
TPS: The total number of Expected Points a punter saved