Suicide self harm monitoring data - Ambulance attendances?

I want to note that WA is not listed on an Australian government website which gives us a snapshot into the mental health of Australian’s.

I know that WA ambulances are not controlled by the state - I believe that they are privatised? But it means that data that would be very much helpful for a story we are writing is not accessible.

We want to know how many callouts in 2020 did 000 or 131444 get for people threatening self-harm and did that number go up or down from 2018/2019.

Any assistance would be much welcomed.