Source is the Lightfoot baseline and capacity review for NAS.
It states the busiest area for NAS is Loughlinstown. Second is Dublin South East amd third is St James Didn't have any luck finding more detailed breakdown of statistics unfortunately. The report is mainly dealing with response times.
I originally heard this from a Paramedic and other random sources but official source is that report.
Makes sense, Tallaght and (formerly) James would be the closest Dublin Stations...
The lack of other close stations seems to be exactly why its been earmarked for improvement and development / relocation in the report.
Heard they are going to move it up to Sandyford... Don't know how true that is.