Riddle Up

 

Again with the riddles :) So I like to jokingly bemoan how the cumulative numbers keep increasing on any statistic that the media is tracking. That's how cumulative numbers work - they can only go up or level off. Your age is a cumulative number so my partial answer could be correct. 

Text:
M: What goes up but never down?
L: Cumulative -
M: Your age.
L: Yep, that.