In the US in 2021 the NY Fire Department attended 10,639 incidents that were deemed “structural fires” out of a total of 1,213,715 incidents.
The vast majority of the rest are actually medical incidents.
Fires are just must less common (more alarms, less smoking, better safety).
Fire departments in the US perform the role of ambulances – in 1980 they attended 5 million medical calls but in 2020 this was 24 million (Covid notwithstanding, a huge rise).
Contrarian article arguing why fire departments have perhaps put themselves out of business.