In 2017, there were 13 electrocution-related deaths in the UK. In the US, there are between 500 and 1,000 electrocution deaths per year. This translates to 0.019 deaths per 100,000 inhabitants in the UK and between 0.149 and 0.298 deaths per 100,000 inhabitants in the US.
Note that there is 240V in every US home. Low power loads run from a center tap 120V circuit. Also I wonder if people manage to electrocute themselves on "high voltage" circuits (typically 7.5KV) which due to the 120V thing have to be run everywhere so are more available to the casual electrocutee. In the UK although there are high voltage transmission lines, they terminate at substations, are often buried at that point, and there are high fences make it hard to electrocute ones self. E.g. a guy around here managed to electrocute himself very badly (but still survived) out in the woods by touching a bear that had itself become electrocuted by a live unprotected 7.5KV line.
