How to get average years of service by company and gender in OTBI?

Summary:

I need to create an OTBI report to calculate years of service by company and gender.

Content (please ensure you mask any confidential information):

This is my situation:

but I have horrible results (years of service is not so high on average):

I also tried with this formula: Avg("Work Relationship"."# Of Years Service" by "Legal Employer"."Name", "Worker"."Employee Gender")

but the result is the exact same.

What am I doing wrong?

Version (include the version you are using, if applicable):

25B

Code Snippet (add any code snippets that support your topic, if applicable):