Bring a Pie Chart of Organizations to the Dashboard

[Tobias Frommer]

Hi together, 

i need your help about my problem to get a "statistik" of our used organization´s.

I have created a rule that when a ticket is created, the domain of the mail is recognized as an organization and the creator is added to the organization.
Now I would like to add a report (pie chart if necessary) to my dashboard that shows which organization has created how many tickets.

The pie chart works with the individual users, but not with the organizations.

Can anyone help me with this issue? :)

Best regard,

Tobias Frommer