A resume without numbers is suspect. If you can’t quantify your experience, who knows if you’ve accomplished anything?
The purpose of a resume is to help the reader understand how you justified the cost of hiring you to your former employers. What did you do that saved or made the company enough money to pay for your salary and benefits? The more clearly you can quantify your accomplishments on the job, the easier it is for hiring managers to imagine the value you could bring to their organization. Conversely, a resume without numbers screams, “I don’t know my worth and I’m just trying to make myself sound successful.”