Well, as one of the "firemen" on the board, IIRC (from an investigator's point of view) that less than 9% of all the fires currently listed as "electrical" in origin really are.
(get it? It's an electrical pun! Y'know...currently... electrical? Oh, never mind)
I think I've seen maybe 6 or 8 that started due to electricity - including the wintertime 30A fuses feeding space heaters on extension cords under carpets one, and the summertime 20A window A/C 'pigtailed' to a 16 awg lamp grade extension cord one.
The investigator on our shift has a really hard time calling any fire electrical in origin - she calls it a "lazy determination".
