Power bi Help

I have a table with 22,000 rows of data in a category

I have a list "Category" , "reported Date" that's it. 22,000 in my list

there are 83 different category's in my list.

try to get Average per year and month. i don't know what i am doing wrong.

thank you

Category	Reported date
Clinical equipment / consumables	26/05/2022
Documentation / health records	20/12/2022
Information Governance	21/02/2022
Communication	24/06/2022
Documentation / health records	16/09/2022
Verbal Abuse	29/12/2022
Actual Physical Assault	12/09/2022
Systems of work	26/09/2022
Breach of policy / protocol / procedure	05/10/2022
Patient journey	07/03/2022
Discharge issues/concerns	05/10/2022
Discharge issues/concerns	14/09/2022
Breach of policy / protocol / procedure	14/09/2022
Breach of policy / protocol / procedure	07/12/2022
Speech and Language Therapy	04/10/2022
Flood	24/10/2022
Flood	24/10/2022
Treatment / procedure	06/11/2022
Moisture Associated Skin Damage	04/09/2022
Breach of policy / protocol / procedure	18/11/2022