When the project is giving you dashes “-” on the change column, instead of numbers, it means your website ranks for that specific keyword in the position 99+ on Google search. Check the example below.
Don’t feel discouraged.
If you do not rank for these keywords yet and want to find more lucrative ones, you may want to check this article where Neil explains how to find the right keyword to rank well on Google, and this article will teach you how to rank for multiple keywords with one piece of content.